DingDingDing... RPM's #1 expert/tester and most importantly whore to the rescue.
I have been using RPM for about 7 weeks now. The last 4 are logged in the review section. Anyways, Ive tried several different combos and heres what I think:
RPM is a very potent stimulant. If you are going to stack it with a stimulant-type preworkout formula, keep the RPM to 2-3 caps and you can take a few more capsules later in the day if you want to keep the dosage the same. I personally take 5 everday, regardless of how many I take preworkout. I think you get a much better 'hardening' effect like that. Heres some of the combos Ive tried:
5RPMs/Fasttwitch(caff. free) = very nice energy and pumps
5RPMs/Ragnorak= strength was much better but I had some serious rapid heartbeats going on.
3RPMs/Ragnorak= no jitters this time, but not as good as the fasttwitch
5RPMs/Horsepower= felt good and strong, but Id rank it just below my fasttwitch
5RPMs/ClearShot Rtd and 5RPMs/Matrix RTD = way way too much with both
UGABS SUPA-DUPA MUSCLE EXPLODING PREWORKOUT STACK
5RPMs + 3Cordygen5's + 2servingsFastTwitch(c.free) + 6 clear edge caps + 600mgBulkSulb.Powder
That is what I would take If I absolutely had to be positive that I would have the best workout of my life. Its like this euphoric, motivated, crazy good feeling. Your pumps and mental drive are nutts. Your stamina is neverending. Try it and find out for yourself man.
Thats my .02. Let us know how your combo goes.