Hyper 10SC gearing Q

[fastbaja5b]

Hey guys, just picked up a Hyper 10SC, any ideas on a starting point for gearing?

Will be running:

Aeolian 100A Brushless ESC (Same as Hobbywing 100A thing), picked it up off a mate for $30 so we'll give it a bash
Medusa 36-50-3300 ($40 on Ebay woot!)
2s or 3s Lifepo4 Batteries

Stock pinion is a 12t and I think thats more suited to your Mamba 5700's etc.