Need help figuring out budget brushless for revo!

[nitrostarter]

You sure can run the MM on 4s and 5s, just use an external BEC.

If you wait a few weeks, Castle will have available the new Mamba Max Pro, which will be 6s capable out the box.

I think you could pick up a MMP or MMM and a Feigao 11XL again and run that on 6s. Should work fine in the Erevo and have plenty of power.