Tactics aren't as important when it's 12 v 12.
Although, I do think Australia and, maybe England (because of the extensive pace bowling all rounders) could still come up with n XII that would out-match India's best XII. Especially as India's best/only pace-bowling all-rounder is presently public enemy #1 and England's, worst on paper, but double-final winning all-rounder is saying 'I don't wanna play cause we're playing Sri Lanka and West Indies in test matches.' Meanwhile, Sam Curran, who England fans (me an @Aislabie at least) don't rate, is one of the most sought after players in the IPL. While we just want JOVERTON unleashed.
I think tactics do count for something in a 12v12 matchup. Imagine Australia getting an extra slogger in or England being allowed to use an extra favourable match-up option.