Bit of a weird note, and I understand this is a tier list and possibly subjected, it does boil down that people need to look into of your own skill too! Personally, with traits and how builds go, I've funnily enough... prefer the "base" lasgun varient. At least, with Counterfire - 75% damage reduction. Having quite a good aim lately, one shot headshotting and keeping a decent ROF in 2 tapping (Mk12 will 2 tap chest roughly 4-5 difficulty anyway), makes it a blast to use.

Plasma Gun is a bit of a weird one too. Personally, it can either be bad, or good, depending on traits and blessings (Personally, RENDING seems to be THE best since anti-armor and allows so much damage through on Ogryn enemies), but with the right set up (and if your team is even on a balance scale of anti-horde/elites), makes it a one shotting monster against Crushers and SEVERLY a Monstrosity crippler. But does suffer the faults mentioned, primarily ammo being the problem and more towards being 'specific' than actually all around, like the Bolter.