There are tons of active abilities that could be added that are not the basics. Ill list a few i got but there could always be more
Get this out of the way. For Psyker it could be any psyker power, there are lists all over 40k
Veteran:
Militarum Rocket Launcher-self explanatory
Long Las (scoped with multiple charges?)-we need snipers
Melta Bomb- a hand thrown and manually activated (in this case) anti armor bomb commonly used by the guard to dead with vehicles or heavy armor. Throw the bomb, hit the button…watch the boom
Zealot:
The Purifier-A hand flamer taken out to deliver a short range but powerfull blast of blessed promethium. High knockback and damage and catches enemies on fire. Shortish cooldown and possible multi charge (works similar to bounty hunter’s pistol in V2)
Vox Skull- a summon that follows around the zealot and provides moderate but mostly constant buffs to those nearby. Active is the zealot places it at a location where it will taunt enemies until destroyed. Does not provide buffs until re summoned (possible upgrades could be exploding on death or many other things)
Ogryn
Las Cannon- powerfull single shot weapon normally affixed to tanks. Slow, bulky and very powerfull with high damage and peirce but slow to recharge
Ogryn Rage- cast aside your puny weapons and fly into an ogryn rage. Gain a bit of damage reduction and speed and access to a bare handed weapon set for 30 seconds (upgrades to change or enhance buffs and possible upgrade to give more time on kill?)
I think, for veteran, might also be worth considering a man-portable mortar. Its pretty well established in the lore that the Guard make extensive use of them.
I thought of and would love this but outside of the large open rooms im not sure how it would work, with the ceilings. Why i settled on a rocket launcher.
Stormtrooper.
Volleygun: Working like VT2’s Outcast Engineer, but with a Hotshot (Volley)Lasgun.
(B) Rad Grenade: low count grenade that create a big AoE slowing and damaging DoT.
Commissar.
Commissar’s watch: Buff a targetted allies, giving them various buffs.
(B) Emperor’s Mercy: Stub Pistol used to execute heretics, high weak point damage, and deal a lot of suppression to enemies near target.
Zealot:
Enforcer.
Cyber Mastiff: Give the Zealot a pet Cyber Mastiff, that will fight alongside it, but can be killed/taken out, which will make the ability return to cooldown. While the Mastiff is up, the ability will make the Mastiff hunt enemies freely while using cyber upgrades.
(B) Concussion Grenades: Impact grenades that will push any enemies too the floor