True, you cannot use Dispellers in Team Battle League. Which is retarded.
You cannot party queue, you get a party of randoms only. So if the other side has classes that have 1-hit kill poison ticks, and you don’t have an Oracle/Plague Doctor, it’s an instant loss.
Team Battle Arena is possibly the worst feature implemented on the game. They’ve improved it a lot, but until we get party queuing, it’s just a lottery.
Up until here I was speaking in open GvG terms, where everything works under PvE rules. In the GvG arena you’ll definitely have a Plague Doctor on the team at all times, and for the Team Battle Arena if you don’t have a healer and the other side does it’s an instant loss regardless of anything.