Mass Effect 3.7: "That was for Thane"

[Morty]

Drell Infiltrators... Hmm... Warp, Tactical Scan and Assassinate/Marksman? That's what I think of, when I think of someone like Thane; a Hired Killer-come-Sniper that'd probably suck at fighting crowds of mooks, but pick one special enemy and they'd be toast in short order.

Marksman wouldn't be too useful for an Infiltrator, since they tend to rely on sniper rifles. However, a power similar to Marksman but tailored to slow-firing weapons would be nice. Although of course, at least one slot would be probably filled by Tactical Cloak.
And if Collectors appear again, I'd much rather see them as enemies.