Unfortunately, at the time that WAND was actually functional as an agency, it was an arm of SHIELD. I would say that kind of disqualifies it from being used during that time period (using SHIELD to infiltrate SHIELD feels kinda...off, if you get my meaning ^_^).
But as you say, there is the current WAND.
Hm.
Currently it has like...three people? And is somewhat unofficial? Does its members still count as 'intelligence agents', or is it a super-team?
Still of the opinion that five Imperium Godkillers are just fine for this.
.....
Three Imperium Godkillers. Maybe two, depending which.