dark pulse is mandatory but the last two moves can be a bunch of things like roost if you want hydrei to last long but you can also slot taunt in that slot for more offensive builds
the last move is more team dependent but i like earth power because you own bisharp and heatran and exca while also preventing diancie from coming in for free
draco can be used for raw damage on pokémon that don't fear either pulse and ep like zard-y and guys like keldeo on the switch. it also lets you drop kyurem and tankchomp who can eat a few dark pulses and do big damage back with dragon tail or ice beam
the last move is more team dependent but i like earth power because you own bisharp and heatran and exca while also preventing diancie from coming in for free
draco can be used for raw damage on pokémon that don't fear either pulse and ep like zard-y and guys like keldeo on the switch. it also lets you drop kyurem and tankchomp who can eat a few dark pulses and do big damage back with dragon tail or ice beam