clusters and rest-pause methods have been very effective to me in the past; I know how i react/recover to these methods, so implementing this kind of training is not new to me.
If i start to feel burnt out(which i really doubt), i'll lower the volume of the assistance work. Doubt that i'll have to do this since im deloading every fourth week.
Don't get me wrong wendler's 5/3/1, has given me great gains the past year and a half. The reason why this program has worked well for me is not the percentages or the rep scheme; it's the flexibility that it offers. I've gotten a better idea of what works for me, and what doesnt work for me (ex. more assistance work for my shoulders and less direct assistance work to my chest, etc.)
wendler's 5/3/1 has taught me that training is a lot like a science experiment. You manipulate one variable, but you keep everything else in control. From there if it works, use it, if it doesn't don't bother with it and move on.
That's exactly what i plan on doing, manipulating one variable (intensity of working set), keep everything else in control (assistance work & core lifts.)