I always take the rez powers. It frees up 2 inspiration slots, 1 for the wakie & 1 for the break free for 2 more reds instead. I'd rather have the rez power with a 2-3 minute recharge vs 1 hour for the P2W, even though I do purchase it.
The way I look at it is if you're carrying a wakie you're expecting to die anyway and wakies are worthless if you die surrounded while the rez power has the 10 second immunity which let's you A) run away or B) activate your defensive powers to continue the fight.