The only reason I don't tank in roulettes much is aoe pulling. There's no reason why war for example should only have a conal aoe outside of its beast gauge abilities, and I find aoe gathering can be really wonky to judge the effective distance. I do trials fine, when they don't have particularly long or annoying add phases, but dungeons i kind of dislike. I don't think the game works well with big aoe pulls; i mean i do them, but i feel tanks should have better tools to deal with them in terms of gathering them up.