The dosages are fine if used within normal dosing ranges. Stacking them is very common and popular, and works very well IMO. I would start with 1 dexaprime, with 2 tt33 and see how that goes, but feel free to bump up to 4 tt33 whenever you choose. I always prefer to start low and work my way up when things slow down. The 3,3 / 3,5 concern although a serious issue, was blown way out of proportion. The dosages are just not anywhere near high enough to raise a red flag.