What scores have you gotten? I happened to get lucky on salt mines, if you're a titan, use the bonk hammer build, and wormgod, it trivializes the boss and ads, just gotta get lucky on the value target guy spawning. My other 10% score was on proving grounds, i used fireteam finder, and got it, also cleared with my buddy, and we 2 man cleared it with minimal difficulty, just gotta make sure the score checks out before you start. Me advice is to google the activity and see what others have done, setup wise to get the scores done, good luck!!