Looking at the numbers (via a video review of pacifiers at
https://www.youtube.com/watch?v=I1LhlVozo7g) and comparing them to my overcharged C3 cannons, it seems like a a hit from my current cannons is about equal to two trigger-pulls from (unengineered) Pacifier Frags, at the cost of 45 piercing vs 70 from a normal cannon.
If I throw something like overcharged into the mix for the frags - giving a single trigger pull of the frags more damage than a single from the cannons, plus two more before I need to reload - that makes me quite excited. And also makes me lean more towards overcharged vs high-capacity for the six-shot-burst.
Those numbers should make up for the fact that I don't plan on running corrosive either, since one weapon with significantly less ammo is just wildly annoying to me.
/edit
Given how rarely I let my ammo get that low anyway, I should probably just suck it up about corrosive on one, shouldn't I?
But I know I won't be able to stand the reload time difference if I put screening on the others, so it's either screening on all of them, or corrosive on one and something else on the other two... Hm... Drag sounds like fun... Maybe toss in a dazzle? I already have Dispersal on one plasma and will put TLB on the other...