Should I try for Legendary Lucina or wait?

If you want her but you really really want veronica then spend some orbs but don't spend all of them,
if you want Lucina more then spend as much as you like.

IMO free summon then bail, yes Lucina looks like a good unit but CYL units have the reputation of being the best of the game, cause look at the first CYL they are op even the 2nd placers are good.
But it's your orbs so spend it however you like.

You should skip. Archers are in a bad spot in the game right now, and a +0 Lucina is not going to have much value for you. On top of it, the blue pool has a giant fodder landmine in Azura. If you realistically want to use Lucina now beyond PVE content, you're going to need a Firesweep Bow for her like every other player phase archer not named Jakob, so that's another five star pull.

By the time she is re-run in 3-4 months, there is some possibility IS will have finally introduced new skills that will allow archers to be effective again (a buffed version of Guard, Firesweep Bow in the 4 star pool, etc.).

That said, let me offer another piece of advice: if you're interested in +10ing Veronica, wait until she's re-run on a banner with better odds than CYL will have. Four focus unit banners with one on each color have notoriously bad odds, and the CYL units were re-run pretty frequently last year.

Sniping for a specific unit on a legendary banner is horrible, but there is good value on these banners if you don't care which unit you get. If you are fine with getting Ishtar or Azura (yikes), then I see no harm in going for her here. But otherwise, I think you'll have much better opportunities down the road - she WILL be rerun.

Further, it'll take, on average, about 200 orbs to get Lucina if you're sniping for her. That's just the way the math works. Sure you could get lucky, but if you go in with less than 200 and you come up empty, well...that's the way it goes.

Hope it helps!

The answer is actually quite simple, so do want anything else on that banner? Specifically in blue, but it could be in another colour as well. If yes, how many? If you want at least 2 other heroes, then it's probably a good investment. Otherwise skip it.

Take your free round and walk, that's what I plan to do. Granted I planned to do that on Hector's banner too, but 3 units @ 5* on my free round said otherwise!

Veronica Is going to be a beast! Just look at her taking on TEN heroes at once!

If you want 2/3 blues, you're getting good value to pull for a 5*. However, let's say you only want one Azura or one Ishtar, and you get that unit before you get Lucina. Then it's time to quit, because now you only want 1/3 blue, which has 0.6666...% appearance rate, which is worse than being on a banner with four focus units meaning that you'll need to fire more orbs to find her. She won't appear on a banner with four focus units because she's a legendary, but you're getting poor value for your orbs.

I'm curious, how many orbs DO you have saved...?