Bounty Hunter & Trooper - Simple Questions and Answers

[Mortycia]

After posting this in the Arsenal Mercenary dps compendium i figured this question might be better posted here, since it kind of interupts some theorycrafting at a lvl i do not understand.

So here is my question:

Looking at the pve gear set and the pvp gear set (Eliminator) and seeing the overload of Power on the gear, it's safe to assume that we have to switch out some of the +power mods for +crit and +surge mods?

This will result in putting lower Ilvl mods in the gear at certain Tier's i guess?
(Highest lvl mods that i could find till now are the one from the dailies)

Any info about this is greatly appreciated