Interesting. I heard it said among a few people I know are great players that 8 Corruptors can take out any content in the game. Blasters bottom tier? I kind of get what you are saying but then realize you are not talking about things like Really Hard Way Magisterium. Damage is “just damage” until your team is low on damage. Then it is an emergency. You know your odds for a really hard way go way up when there is a ton of Blasters and Corruptors on the league. Brute/Tanker I get what you are saying. But it depends on the powersets and the player more than the AT there in my opinion
When I run PUGs I take whatever. But dream team? 1 Tank 7 Corruptors. In a League. Add another 1/2 Tanker types, Fender, Troller and some Blasters then w/e