Making a martial homebrew class feature that's supposed to be similar in power to hybrid class spellcasting; is 20 max points (like the monk) a good amount at level 20 or should the amount be different?

I'm questioning whether this feature uses AC or hp as it's point resource, as this class has an abundance of both at level 20, and when the duration of the effect ends characters can recover half of the expended resources (at high levels). 

That depends on how much the powers cost to use.

Quote from 6thLyranGuard >>

That depends on how much the powers cost to use.

 Comparative to that of 1st level to 5th levels spells

Assuming you mean the spell point variant system from the DMG, if you're going for a half-caster class you should give it the spell points for a 10th level spellcaster.

Quote from 6thLyranGuard >>

Assuming you mean the spell point variant system from the DMG, if you're going for a half-caster class you should give it the spell points for a 10th level spellcaster.

 thanks

Oh but the resource pool I'm using doesn't have spell slots, the resource is flexible like ki points