you get points for various things. you get points for doing damage, but your big time points come from KO's, submissions... then reversals/blocks (anti-takedown) and takedowns.... doing a bunch of ground transitions = waste. either beat him into a pulp or counter everything he has. i find that going for submissions is a waste because you spend so much time with the animation trying to get it done that you waste pummelling time.
try to land big hits, get into full mount, use slams, takedowns, reversals. i get anywhere between 100-180 each session this way.