https://cityofheroes.fandom.com/wiki/Task_Force
7, lol
Yeah but merits need to be based on time spent and Tarikoss is downright painful if you dont have someone who can stealth scout and tt to the foreman and leader, as that map alone would take well over an hour to clear.
Also that last mission requires stealth to scout out the obelisks.
Its not hard, but if you dont have a team that knows the TF and how to scout and how to WAIT for the scout it can become a painful slog. Citadel you just keep run and burn and still finish it in an hour or a bit more.
After doing both, its way way WAY easier to get a team for citadel and there is much less griping if you didnt recruit a dedicated stealther.