Tyranitar from raids
I've been doing quite a few Tyranitar raids lately but I have only managed to get one over 90% IV's so far. I already have one with B/C @ 84.4% lvl 36 with 15 attack stat. The one I got from the raid is 91.1% with B/SE (which is the moveset that I want) and 12/14/15 in stats.
Should I power it up or wait for a better one? My main gripe is the fact that it "only" has 12 on its attack stat. At the same time I'm not sure I will be able to get a better one from raids and while I could hatch one which is superior, the fact that I would need plenty of extra candies to evolve it makes it less appealing.
Answers
It doesn't have a 12 attack stat; it has a 12 attack IV. Big difference. That means its actual attack stat is 263, compared with 266 if it had a perfect 15 attack IV. That is a 1% difference.
Are you seriously doubting whether you should power up a Tyranitar with the exact moveset you want, because it has an attack stat that is 99% of perfect (along with 15/15 and 14/15 in the other IV's)?
I am not powering up any raid Tyranitars beyond level 30 until after the bosses change, as daltry said - you know how much it would suck to catch a 100% B/SE the day after you finished maxing that 91%! However, since 91% B/SE is going to be immediately useful, I don't think it's a problem to take it to L30 if you have the dust/candy.