Def need an ogryn for pugs imo, else hard for veterans to get out of melee instead of picking off snipers. Vets should get a fast hand weapon swap or something.
if you have a psyker, stick near them. assuming they aren't stupid. they are cc machines, not dps as you might expect.
I think I mentioned it, but psykers force sword is stupid good. on push, its a large aoe pushback, then when doing the follow up counter attack, instead of damage, its an even larger pushback. Psyker can spam that shit to lockdown hordes, pick up fallen allies, etc. Their Ult, is ALSO a massive aoe pushback. (and top teir perk can enable to deal heavy burn damage). Which can knock mutants/dogs off people. boomers dont even get close ever.
Can get Deflection perk, enabling ranged and melee blocking, and stam cost reduction.
Most psykers are then going to use 1 of 3 staves.
lightning staff can hit 4 targets on charge, and stuns them. including elites and specials. again, can stop a mutant charge dead in its tracks. so, limited aoe, and range. but stunlock. again, boomers have no chance.
flame staff burns targets. stacking dps. suppresses hordes.
void staff fires a heavy damage piercing bolt. kills hordes outright.
Psyker also uses no ammo. all for you.
And, passive 10% damage buff to you.
Just go ahead and kill whatever the psyker is brainbursting. its not worth not kill securing it. The blue halo is techically not a targeting aide... but fuck it.
Zealot running a flammer would also have strong melee control to pair with.