It's a compound function of feasibility (in his opinion) and support. A great tactic with no support will not get used; a bad tactic with lots of support will get used unless it's obviously suicidal.
Well let's do this. By those standards, we benefit the most from every tactic having a similarly mild amount of support. That way, the value will be decided by the Hero who's presumably smarter than us.
I don't know if we want to risk him getting into the water to escape, but since his armor is already leaving impressions in the floorboards creative destruction of the ship to unstabilize him might be good.
As for tactics, so far the most popular one seems using the deck to our advantage, by having our opponent drop his foot through the floor and lose his balance. One thing we could try is tying the rope around him, throwing the other side to Verse and then having mecha yeet us to it.
Tactics: He's heavy enough to leave indentations in the wood and does not appear to have any ranged options available to him. Mobility is our advantage, his is his blade's greater reach and the shield. Fight as we kite, sink the ship with more cuts, try to get him into the water. He won't drown, that would be convenient, but it should slow him and might douse the weapon. We should watch out for the ballista bolts we tossed overboard in case he tries to imitate us, however.
Alright, I believe we might want to sink the ship if we want to fight this guy, water might help against his heavy armor and flaming blade.
We could always try baiting him into stepping on a weakened wood and strike him while he is unbalanced.
2. Ruin affects the ship, so we have authority over what is and isn't reliable footing.
The stress he puts on the boat likely means poor maneuverability; we can drop down and blade-wind from below by seeing where the wood has stress on it.
Using the relative frailty of the ship against him seems to be the most popular tactic, and something I
support. I don't know if this extends to the point of dropping him in the water, however.
This is a ship so we could try grabbing a net or some ropes to slow him down, although between his combat level and our disability that somewhat of a long shot.
Maybe we can use a rope to yank on his shield? Having only one arm is a problem, he can likely get a free hit if he doesn't resist the pull. If he gets his sword stuck on the scenery, that's likely a free opening.
4. We can grab those grappling ropes, the curiously resilient bowstring, and had already grabbed that grappling hook. We can likely briefly restrict his motion or even turn this into a 3D fight if we break the floor, which would be even more in our favor.
Despite my suggestion, I don't support the ropes; he's likely heavier than us and we only have one arm. If we had another had free, things might be different.
Timely mecha punch would be very useful.
Would be nice, but unknown feasibility, so I won't support it.
Maybe we can use the plank he's standing on as a lever? Hopefully the water impedes his flames then we move in for the standard armored counter and start grappling him, our swords length is actually quite suited for this but unfortunately lacking an arm does hurt us.
Grappling him is bad with only one arm; so no support.
We can also start the fight by retreating behind the gap and throwing ballista bolts at him; it seems he would have difficulty crossing thanks to his armor; even if he blocks, the lightning effects should get him. Though, maybe the fullplate acts as faraday cage? The lightning seems clearly magical however, so I don't know if it'd come up.
3. We have some ranged options, be it the two discharged ballista bolts, broken debris from the ship, or the crewmen themselves. The last may be going a bit overboard though.
I
support using ranged attacks against him; kiting is an advantage of greater mobility, and we don't care for this ship while he does.
By being behind the mast and a bit to the side we can at least block one of his sides either from defending or attacking, while that doesn't matter for us due to having only one arm.
Something I'm iffy on, don't know if it'd be relevant given the powerlevels of the fight. Cool if it worked.
Maybe we can ask Gisena to let some beasts towards him; again he seems to have poor maneuverability; so he has less defense at being swarmed, so it's advantageous for us.
Also, we might want to combine the fights so we can force him to fight Void Spawn, maybe even freeing Gisena to help us with a couple of bolts.
Given that his sword's on fucking fire and he's bleeding darkness, I think we can safely assume Nullity'll be effective on him, so if we can briefly trade with Gisena to relieve her while she debuffs him that'd be cool too.
Another tack would be to demand he helps with the rift and get him in range of Gisena so we can put him down easier. This seems much more difficult though.
Luring them towards Gisena; something I
support. Turning off whatever supernatural abilities they have is an incredible advantage.
Use the grappling hook to retreat back to Verschlengorge if necessary.
Tactical retreat options;
supported. Obviously useful.
Also, we can recall the Forebear's Blade to our hand if disarmed, so if we're stuck in melee maybe 'let' him disarm us to create a fake opening.
Hmm, Rihaku mentioned that Forebear's blade returns to our hand if called. Could we abuse this to make repeated thrown attacks, then autorecover our blade from unexpected directions?
He has sword and board versus our broken blade, which is kinda bad all around. Still, we do have ability to call our blade so we could try and tackle him down and then summon blade to us once we wrestle his out of his hands? Alternately, we could try and make use of weapons on board.
I don't support sword throws; seems something very finicky and with low clear reward. Would be fine as another miscellaneous ranged option if we kite however.
Maybe unbalance him by throwing his own dudes at him? Or make the mast fall on top of him? I don't know if his maneuverability is that poor, however.
I'm inclined to think fighting among the crew might help. Violet flames and billowing darkness make me believe he'll have some sort of projectile or pbaoe capability. Keeping our back to his men and fighting around the wounded could discourage big explosions or auras or spooky darkness waves if the crew's similar armor doesn't provide immunity.
Hmm, if he's slower than us maybe we want to keep the distance for now. Stay out of his engagement range and pick off the rest of his crew in front of him. They're probably too weak for Hunger to give and gains from killing them but it'll remove a distraction for us and might put him on tilt and have him show an opening we could take advantage of. While also giving us more clues about what his artifacts do and some time to see if we can appropriate any more useful battle items the crew might go for that might be on the ship before committing.
He may feel responsible for his comrades or he might have friends/family on the ship, so we could go ham and put them in danger of collateral to make him hesitate or lose composure.
Attack the other crew;
supported. We likely need to deal with them anyway so they don't interfere,and using them to imbalance or hinder him is just an obvious extension of that.
I think we should start by making some outrageous demands to put him off balance. Then try to get him into the water.
I think we should play to our Ikesai roots with our banter, and take a position of hypocritical high ground. Literally kick his men while they're down, go through some pockets if we have time, while claiming objective moral superiority. I'd like to have him mad if at all possible. Criticize piracy while performing theft and murder on the high seas.
5. Our most dangerous weapon - our tongue! Shut up, Gisena. We should try to find psychological weaknesses and strike at them. Not much to go on right now, but he's already engaged in banter, so we can take advantage of that to draw out more information.
Supported. Charisma is something we paid for and seems to be something we are very good at. Tilting him has obvious benefits.
If you want the support to stay balanced like I suggested; simply invert the support I gave. Remember how to format this:
1) quote the tactic(s) you are supporting
2) mention in bold that you are supporting them and
3) include any commentary on said tactics.