With only 5 more levels to go, I have no faith in SE to add any new blood pact: rage abilities to the current avatar line up since there's two more avatars coming around that time. So instead let's focus on what we can do by figuring out what skill chains we can do that can deal significant damage that you can't do out right with current list of both high tier and merited blood pacts. Damage of the blood pact and skill chain combined have to be greater than using your strongest blood pact on that particular avatar if your goal is to maximize damage.

Then after that, you still have to compare the damage of our skill chain to the to others. SMN do not have skill chain bonus traits or gear and last I remember, neither magic burst bonuses on avatars. Correct me if I'm wrong.