I've done step mashes both with decoctions and with infusions for wheat beers in the past and have had few problems. It does complicate things and extends the mash time quite a bit but it's perfectly doable.
but..
The last wheat (soon to be cherry wheat for SWMBO) was a single infusion at 152 for 90 minutes. The grist was 60% wheat. I used 1 lb of rice hulls and had zero problems with stuck sparges... I think .5 lbs would have been plenty.
The temperature rests just aren't necessary. You might get slightly better efficiency but that's hardly worth it. With adjuncts like wheat and rye the mash can be very very sticky and can easily cause stuck sparges.. a protein rest will allow the enzymes to break down the proteins and allow the mash to thin out a bit... but rice hulls are a much easier solution to stuck sparges. FYI, a protein rest when using highly modified malts can result in a thin, watery beer.. it's best reserved for rye and wheat beers though, even then, I just don't think it's necessary or worth it.
The only temperature rest that might be worthwhile is the mashout - just take most of the runnings out of the grainbed, boil them and add them back to the grainbed to get the temp up to 165F or so. You'll get slightly higher efficiency this way and the grainbed will loosen up a bit with the higher temps and most importantly you'll denature the enzymes and will thus stop any further conversion that might have otherwise taken place during the sparging... this way you can lock in the fermentable profile and ensure that the fermentable/unfermentable ratio you were shooting for with your mash temp isn't thrown off by an extra hour of enzymatic activity/sugar break down during sparging. Still, I've skipped this step more often than I've done it and I never notice a difference.
I know it's fun to try and do the most complex mash schedule imaginable just for bragging rights or to prove to yourself that you can do it but a regular old infusion mash works just great and there is much less to worry about and much less to go wrong.