making short work of the Tsoo (Orange boss, no prob, Yellow yellow ink man easy peasy, yellow sorcerer ha-hah! I laugh at you!).
Strangely, I noticed myself doing decent hits in a bunch of -2 or -3 mobs of Tsoo in the SW corner of Steel Canyon, the hit rate was over 50%... unlike with the evil Clockwork

I just got finished doing a "kill 15 clockwork in faultline" mission (I took out two princes, four tesla and three common kights and an unkown number of ornithopters / cogs), granted they were a couple levels below me but I wasted the whole mob,
I hate you.
after that my ACC went crazy, I couldn't hit a white-con Cog, I ended up with a timed door mission and I couldn't hit a white Tsoo Enforcer, EVERYTHING missed, even the stuff I have two ACC bonus DOs in.
Word up, home. Even more frustrating is when you're at like 30% health, one LT left, and you can't hit him and he keeps hitting you, you're in the red zone, you run away, BOOM outta endurance or he Caltrops or Cages or Freezes you or whatever. 5 misses in a row, he gets 5 hits in a row, you'd think I woulda left before it got that "uh-oh"ish... Like I said earlier, debt from 4 deaths... all due to no accuracy when it counted (i.e. 2 LTs + many minions, usually same level)
So I'm thinking that there must be some kind of nerf that happens when you either:
a. Take out too many of one mob type without damaging yourself.
b. Some kind of ACC problem in or around lvl 20
c. Some kind of ACC nerf during the wee hours to force people to log off
d. Bad karma
And since /. says that my Karma is excellent (yeah, party on) it must be a game glitch.
I doubt it is a game glitch, it's prolly you had some good luck, or didn't notice somebody had given you a long-lasting boost to your ACC or DMG (I've had that happen before, especially in hazard zones - you know, those guys with the attitude "I've got bubbles and I'm not afraid to cast them on strangers!"
I doubt it is #b, although some have said that by mid 20s a properly enhanced blaster (6 slots in offensive powers, natch) can take out +2 minions in one shot, LTs in 2... So maybe NCSoft thought "Hmm.. the mob sizes of 15-30 in higher level zones - for example TERRA VOLTA! - isn't enough, so let's just make it so you stand there shooting the sky while they all pommel ya!"
Good theory about #a though - except I've taken out WAY more Outcasts than Clockworks, and they were about the same for accuracy (although of course the Freeze Outcasts would die faster since their icey exterior don't like fire, strange that.)
And good Lord I hope it's not #c

And for the record, blasters are still the highest DPS in and around level 20.
I move that statement be stricken from the record

I'll see how Captain Puncho (scrapperboy!) is doing now, since with a critical here and there he would fly through LTs especially - although nothing touches a Blaster using a 6-slotted AoE power, for sheer # of minions dead per second B) B) When you don't MISS that is :angry: