Hey /vp/

I was needing some advice on what moves I should have my Tentacruel use

I'm not 100% sure what its stats would be when the pokemon is set to lvl50 in battles, but the currents stats are

level: 62 item: blacksludge
nature: bold(lessatkmoredef, "loves to eat")
HP 216, Atk, 109, Def 112, SPAtk 112, SPDef 169, Speed 150
Current moves: MirrorCoat, Hydropump(probably will change to surf or scald), Barrier, Sludge Wave

I'm just not sure if maybe I should rely on the def it has and change barrier to maybe acid spray or ice beam
or if I should keep barrier and change sludge wave to acid spray or ice beam (or some other SP Atk move that would be good for a tentacruel)

so what do you guys suggest?