Every dps job get their new burst abilities 50 - 60. We also need more burst now because healers have more burst healing too. Whm have their own "lustrate" with 1min cd and astro one with 40sec cd that almost heal full hp if you are low hp. Tri disaster have also one weakness it does not do healing reduce effect like normal miasma effect. It is harder heal manually casted dots than tri disaster ones.