Speaking of our skill ratings...
@durin - I don't see the full benefits from these actions added to the military sheet:
Lessons Learned: Orks (Turn 50)
+5 to all rolls against Orks forces and +3 to combat rolls.
Lessons Learned: Dark Eldar (Turn 54, Critical success)
+5 to all rolls against harassment +3 to combat rolls and +5 to harassment rolls
The +5 against Orks and Dark Eldar aren't there for sure.
I can't tell if the +6 to combat rolls in general were added or not, as they would be in one of the more general categories. Confirmation of which category that's in and how that's broken down would be nice.
I do see the +5 to harassment rolls, unless we got a previous +5 that I don't know about.
Another thing is that I don't think the Juvenat bonus has increased for a while, and I know that's supposed to max out at +100 from what you've told us. It would be understandable if our losses at Fjol have delayed that increasing, though.
I just want to get the heltroopers to +400 skill
Now, regarding getting the Helltroopers to +400, that would be rather difficult. If they max out the Juvenat bonus, they'll get to +356. Situationally that can be increased - against Chaos, while fighting in greater than 20 regiments, and while in a siege (either defending or attacking) they could get to +381. To get to 400 would probably require finding some more mass deployable equipment on the level of the HUD helmets that already give a +15 to skill, which seems rather unlikely. A sufficient increase to the militia bonus might also do it, but I'm not sure what would be needed to further increase that too much, considering that our militia is already the level of freaking Stormtroopers.
On the other hand, the Helguard would have +396 once they max out their juvenat bonus. In the same situation where they max out their bonuses, they would be at +421. So, getting them to over +400 is quite doable.