would you evolve this larvitar?
I caught this lvl 30, 71.1-64.4 iv larvitar, from what i know he would evolve into a 3000+ cp tyranitar. Should i go for it or should i wait.
Answers
Ivs are forever, candies are temporary. The Iv range of attainable egg hatches spans from 67-100%, with an average of 83%. With that being said, I would certainly wait for a better one.
Incase anybody suggests, in the main series, ivs are permanent. EVs (effort
Values) which don't exist in Pokémon Go, were able to be changed from training. I highly doubt Niantic will ever allow IVs to be "trained" or changed on any given mon, as it would be the exact opposite from the main series, and would provide players with one less reason to purchase incubators (to hatch high iv mons, as well as movesets) and therefore may take away from their financial objectives.
If you powered up a 93% from hatch level, it would cost an extra 66 candy and 75k stardust to reach level 30. In exchange, you'd gain ~90 CP. So it's a question of whether a having a 3100+ CP Tyranitar instead of a 3000+ CP Tyranitar is worth the resources -- enough candy for half of a 2nd Tyranitar evolution + 75k stardust. There isn't a simple right and wrong answer to this. It depends on your priorities, how scarce starudust/candy is for you, how likely you are to see a better Larvitar soon, and your local gym meta.
If you may be using it as an attacker, then attack IV is critical due to Bite damage rounding against Blissey, not just % IV. So there are additional considerations.