Worth keep a Mew with these IV?

Question

I got a code of mew and redeem it , was soft resetting and got this configuration : IVs: 30 / 29 / 12 / 31 / 31 / 31 with Modest Nature , sure supposing i'm going to use with Sp.Def/Sp.Atk moves or use one of smogon OU/Doubles , since normally is the 1st time I work in a legendary for competitive xD

Answer 1

That is quite acceptable but if you tried so hard you could try a bit more to get max defense IVs, one stat point may make a difference between a win and a loss. Not all the time. It it's OK for you to lose a match that could have been won with perfect Def IVs, then sure, keep this mew. (The circumstances are rare, but it happens).
U could use AR/powersaves to get a perfect mew with 31/x/31/31/31/31. Preferably x being 0 if you don't plan on running knock off, to make sure you take less damage from confusion/foul play.