Every good set extender has it's place. I particularly like forced reps, but I may do too many of them sometimes. Although if you do forced reps of every set, just watch out for overtraining. I prefer to save my forced reps for an all-out last set. In my opinion, forced reps with a heavy weight may be enough to get your body used to that weight, and make it stronger. But rest pause just increases time under tension, which I don't see as a big strength booster, but might be better utilized in bodybuilding.