All the nukes are 1,5min across the sets, but why Archery and AR also? Their counterpars are semi-nukes with only 60sec cooldown.
Besides that, it seems that corr and blaster version have either higher ticks, or for AR there is additional damage after 3.3sec
(this data is from ingame, from the powerpicks itself).
3x37.58
3x15.48
Versus corrupter:
3x50
3x50
vs blaster
3x100
So its weaker, has 50% longer cooldown, it doesn't really make sense :(