For the style you want BRD and to a lesser extent MCH. Bard is keep up 2 dots, 1 self buff(that for the most part you will always auto refresh anyway), pop cooldowns as and when they happen(or save them for burst if you know the fights), otherwise react to two RNG procs - one of which refreshes your self buff.

MCH is use ammo when available for the most part which forces combo procs so technically once you have ammo you have a set rotation, when you don't it's rng for one proc. One dot and one self buff to keep up as well.