First of all, you never want to stick two attacking moves of the same type on one pokemon. It's unnecessary. Second of all, if you're looking for a stalling Milotic, I'd go with a rest-talk setup.
252 HP / 240 Def / 16 SpA
Item: Leftovers
Nature: Modest
~ Surf
~ Ice Beam / Toxic
~ Rest
~ Sleep Talk
Surf's there for reliable STAB, as always. Whenever you use Rest, Marvel Scale'll be activated, boosting defense. Then you Talk it up to keep attacking. Ice Beam's for those grass types, along with those like Salamence, while Toxic fits with the stalling strategy.
Aqua Ring's not worth the HP gained each turn, while Refresh and Recover are equally useless, due to Rest. I already said about Water Pulse.
Hope it helps.
