No, it's not always that easy. What level was the rest of your team? Were they IO'd out? What was the other Defender? these (and other things) can all impact how easy a team moves.
Debuffers are technically not needed in any content, as long as the team comp is right. That being said, they do make all content easier for a team.
TA/A is a fun combination, but it really doesn't shine until you get Oil Slick Arrow (26) and EMP Arrow (32) slotted up. Even then, it will never be a solo beast unless you specifically build for it with IOs.