Right now, there is nothing in SA that tempts a player from running solo and beating the instance fast and efficient as possible. Players are rather leaning towards auto-friendly teams or just do normal in teams because it requires less effort.

What about adding a reward for the players with top score in SA at the end of a week?
Suggestion:
- Rank 1: 10 adv threads, 10 medium threads
- Rank 2-3: 5 adv threads, 10 medium thre lads
- Rank 4-10: 10 medium threads