I would try a Mamba Max. The Jato is so light, it's not likely you will get any cogging or hesitation. I run a 1515 1.5D/F in my MBX5T and MBX5. The truggy has a little stutter, while the buggy does not.
The 1515 in a Jato is just WAY overkill....WAY overkill. The MM will work.