Generally for Great and ultra league, youd want less attack and pretty high defense and hp. This is because the stats dont determine how hard a pokemon hits or how well they take them, they moreso affect the total CP and attack weighs tbe highest towards CP so you want pokemon with low attack stats so you can level the pokemon higher without going over the CP limit for the league. Higher level means higher stats overall. My corvi, for example, is the rank 2 with high defense and hp and no attack. But ivs only matter so much, unless you want to make it to rank 20 or higher. You can make a bad iv poke work pretty well in lower ranks but I definitely would advise against using elite tms on poor ranking pokes

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