New Fang Revamped Motors

I was going to get the Neo Rhino motors until the Fang Revamped motors came out. Since I've spent $200 modding my stryfe, I really don't want to buy a lipo & charger when I have IMR's already. My question is, can I run the Fang Revamped motors on 3 IMR's & a dummy?? 4 IMR's?? I know it's not recommended but I don't plan on entering any games soon. Maybe 1 day I will go with my son. Also, what's the pros & cons of 3 or 4 IMR's vs the 2s lipo?

Thanks!