maxamps 4s lipo good?

I haven't tried the newer "copper" tab cells. I do have a couple of the pre-copper tab packs and with an 8XL, we were able to heat the 8Ah packs up pretty good in an 8ight. Your revo should weigh about as much as the 1/8 scale buggy. I'd go with the 8Ah pack(s). They can handle more current draw.