10 per floor would be bad since only mastering 1 and not upping anything by the end game would be like pretty shitty and in the light novel in the floor they're at that kirito gets asuna to cook for him he has several skills mastered and others fairly high and asuna had recently maxed cooking but i don't think it was that hih a floor, i'll look through at some point and see if its mentioned what floor they're up to, though its past 55 since thats where kirito's house is in the super massive go down and alleyway and get lost city. But i'm sure you guys will manage to come up with something :) no rush of course since we're still only floor one haha

Though the set number of points per floor (or level like with attributes) could work really well