Most efficient way of using custom animations?

Hi, just got into animations and was wondering whether or not to use Roblox's default Animate script. The problem with Roblox's default script, it doesn't have mechanics that I want to place in game. ie: Double jump/strafing etc

I also plan on putting custom walk/idle/jump/run, so im kind of torn here since Roblox provides that already.

Should I leave Roblox's animate script and replace what it provides (walk idle jump run climb) then have another script play another animation?

I will also have combat scripts that have custom animations, should that be placed in a different script? Can I just continue to code on Roblox's animate script?