Surf is literally better in pretty much every other scenario. The only times Shuriken is ""better"" is if you NEED a priority move, or know a Pokemon is going to be Sashed and you want to try and nuke it anyway.Any thoughts on using loaded dice on Gren over life orb? You do lose a lot of power, but you have a base 75 priority move and you don’t lose health every turn.
Not really worth the slot, IMO. And this is coming from someone who ironically enjoys Loaded Dice MoxieCross.