very debatable . i like comeback as head gear in SZ. but i guess ink main would be a standard. Tenacity is worth while for rollers especially...just works.
I don't know how you use rollers, but they don't strike me as benefitting as much from tenacity as other weapons like chargers, who
play more safely and have a more difficult time building specials otherwise. Tenacity doesn't help if you're prone to dying.
Do you spend a lot of time away from the zone charging a special, though?
Comeback is OK, it can help if the enemy team is pushing your base hard, but planning for failure isn't exactly a good long term strategy.
I find special saver is more useful as an anti-death ability since you can't always guarantee you'll put the comeback boosts to good use in the 10 seconds you're given, but more specials are always nice.
Opening Gambit is good if you like to take the center as soon as possible. Last-ditch effort can be godlike but is iffy in ranked due to there
being no guarantee you'll get to those last 30 seconds. In turf wars though it makes last minute victories that much more likely.