How much capacity do I need for a hybrid build?

It depends on your battery. Its really overkill for anything but an all terrain build to need more than about 50 amps per motor

But don’t 10s4p lithium ions have 40a per motor? Isn’t that a bit too little?

Its not to bad tbh. 40a goes a long ways.

Do you think I should go lipo maybe? For higher discharge. The esc I’ll be using (dual fsesc 6.6) has 100a per motor and wouldn’t the be kind of wasting its power?

You really dont need it. At 40a per motor with dual 6374s, you will be thrown from the board if the floor it. If you are worried, add one more p group to your pack. You wont be dissapointed unless you are doing absurd offroad stuff

If you want even more torque, buy the 149kv sk3 instead. Most people dont need high speed anyway

Do you know a reputable supplier for li-ion packs? I was looking at the mboards packs but those only go up to 4p.

I’m looking for a pack too.

Not sure if i want 12s5p or 10s5p. I currently use a single sk3 6374 but will Switch to dual 6374 with MBS 8" tires. The minimum range i want is 35km.