You can only have 15 skills (not including base skills) so by the time you get to level 100 you're probably maxed out on all your allies and yourself. Taunt is learned by Noble, Sheriff, Militia.
Made a small mistake, Burst only works for assault rifle and machine gun (rifle) it doesn't work for any of the big guns like HMG or chain gun. @lightwired Noble is the strongest for HC because bowguns are overpowered. After level 50 if you've got a 4+ slot bowgun maxed with fire rates and 1 auto fire, you don't need allies and can just solo the noble, (by the time I hit level 70 only my duelist was able to still get kills. Also killer doesn't work on bosses, but the noble +40% exp does work on bosses, and doesn't require you to invest 10 levels in it, nor hit that crit every time.
Oh, and don't give a rogue the laser pistol, laser pistol is so inaccurate you can't hit the blind side of the barn and doesn't take advantage or rogue skills like powershot or oneshot. Use a revolver instead and you'll be able to one hit kill most things, and using a single firerate mod on a revolver gives you a similar speed to laser pistol, just hold down the space bar and you'll never need to invest in reload.
>.< you people need to pay attention to the details on each skill, burst only works on assault rifles and machine guns/HMG. Also powershot is only for non-autofire weapons, since all machine guns are autofire, burst and powershot don't work together, it's either 1 or the other
@Toryama Duelists get negotiation and engineer as their only party skills, not just negotiation like you said. Hunter and Duelists are the only two classes to get engineer which is a must have skill for any team, unless you're a page refresher.
I restarted from the beginning too with no medals, using a rogue and revolver up to level 52 right now, on HC, it's actually pretty easy even though I've got terrible luck with allies
Finally got to level 100 on HC, used Noble with 4 slot bowgun (couldn't find better), then Sheriff (6 slot shotgun), Ranger (freeby grav gun from the level 40 HC medal), Duelist (5 slot revolver). When using a bowgun it seperates air and ground targets, so if your cursor is over the air zone, but the flight path passes through the ground zone, it won't hit the ground units, only the air ones. My best tips, upgrade the walls, keep a chalice on hand at all times, and use party members for their party skills and each with a leech mod, not killing power.
Just max bazookas and max reduce build time, and you can beat all levels easy including hostage, except the last level, you'll need some helis or blimps for ranged AA, while the bazookas are fodder, and yeah this was way too easy and nothing like WWII.