You're going to be rather short on inputs if the idea here is to contact mic the entire kit. To do this optimally, EVERY drum needs to be fitted with a contact mic, each going to its individual preamp/envelope follower. Doing this with just one...well, if you're trying to create a single percussive effect device like a Syndrum or Clap Trap, that would be fine, but there's no decent way to make this work with a single Ears.

And for that matter, I don't think Ears is the right choice here. Something like Bastl's Kong, which is specifically designed for drum pickups like this and which also manages to cram two of the needed functions into 5 hp would be a far better choice.