For Sparkbomb, as you say the advantage there is the forced movement...a Sparkbomb could win things right there, but it could also get stopped by a shield and not get him away from us at which point we could get grappled, which would be very bad. He might be able to resiste the forced movement as well, but it seems worth the somewhat lower damage to at least try and move him.
For Sword Guard, I was honestly thinking we maybe layer that in next turn, but with one attack potentially breaking both, the utility of multiple guards is lower than it might be. Like, one is excellent...a second is very likely to get broken by any attack that breaks the first. It's not useless because it gives you two chances to roll better against equal attacks, but it's not anywhere near twice as good and yet costs basically twice as much (ie: most of our dice pool).
And I'm not clear on the range of Sword Strikes. I know it's better than melee, but I was under the impression they can't go as far as Kindle Spinners. I think based on previous usages that they also take dice which means that using them is a speed boost rather than an actual 'more attacks' situation (and our speed is already boosted, making that less needed). That said, both of those impressions could be wrong, so we should probably ask.
@Imperial Fister how exactly do Sword Strikes really work? What's their range limitations, if any, and do you need to assign dice even to the double cost ones used as a follow-up to another attack?
Forceful Lever is possible, if mutually exclusive with Atgeir Bodyguard, we could in that case do Sword Guard instead but then we can't use Sword Strikes. That might be a better option, though I admit Abjorn seems likely to be very difficult to move due to Leverage. Making it part of an attack is a better investment because he's likely easier to damage than to move, so he hopefully still takes damage even if the forced movement fails (and the Skewer Flicks in the plan do 7 damage, almost enough to win the spar on their own), I worry forced movement alone achieves nothing same as I worry damage alone achieves nothing with Sparkbomb above...combining the two gives better odds of something working there.
I think that even if an attack can go through and hit the second Sword Guard/Atgeir Bodyguard, we know there are also "ablative" attacks which make redundancy worthwhile, though it's a crapshoot if Abjorn knows any. Hmmmm....
...As a general point, I also wonder if we've been approaching this the wrong way, and it would be possible to specify in our orders that if an attack breaks through the first Sword Guard/Atgeir Bodyuard, we try not to intercept it with the second, and instead move to our last-ditch defences like Sway/Contested Movement. That would make maintaining two at once lot more generally valuable, because both couldn't get taken out by a single extremely strong attack, and instead one would just get taken out and we'd keep the second one around for stopping medium-strength attacks next turn. Up to Fister to adjudicate of course.
RE: Forceful Lever, I had actually forgotten we couldn't do it at the same time as our Atgeir Bodyguard, I'd assumed we were using Sagaseeker rather than a ghost-atgeir.
RE: Spark-Bomb, I wouldn't worry too much - I don't think anything is letting us win this in a single round; it'd be too narratively unsatisfying.
One thing we should maybe think about is that logically, he will use his Shadow Hugareida to try and get in close. We don't really have anything like a "tripwire" sort of defence do we? We could maybe try forming a bunch of weak Kindle-Spinners and using our "thread" technique to keep them in a sphere around us as proximity mines/sensors? But I doubt our control is good enough for that.