Power up legacy Dragonite or evolve a new on?

IMO Definitely evolve a new one, thats shitty IV and a meh moveset. Especially for 1000 CP? I have evolved Dragonairs with better CP >_>

Ivs aren't very good, and I personally wouldn't power up anything that low (CP and IVs). Might be a different story if it was DB/DC, but I'd just try to evolve a new one with DT-Outrage.

The old DB sets are much more durable, as you can dodge the defender's quick moves much easier; however, the DPS is slightly less when you're only dodging charge moves.

Possibly if it makes your life easier. Let me ask you do you enjoy using Rhydon? That's what the new DT feels like. Outrage I'm sure feels alof like DP. I don't enjoy using a slow Nite so if you had extra dust and candies to spare yeah go for it. I'd have to also add I'm a huge DB fan so sorry if I'm giving bad advice. IVs are whatever for it but you're not gonna stick it in a gym anyways.

In your case I won't spent any dust on it. I also have 145 candies but I might save my candies to power up my legacy nite. It's 80% DB/DC A15 D10 S11

Just use it as-is for prestiging. It's a good attacking moveset, and IV doesn't really matter if that's how you use it. Maybe throw a few candies at it to kick it up to the 1200 range if you can afford it after evolving a new dragonite.

I have the same dilemma. I have a low-ish IV/CP DB/DP Dragonite. I never see Dratini in the wild, so debating powering this legacy one up. I also have a SW/HB as well (low IV/CP)