How many orbs are you aiming to have for CYL?

0 and none.

Fingers crossed that I won't need any.

200, only if the units are good.

I'm just hoping they rerun the original CYL banner at the same time so I can +10 my Brave Ike. Otherwise, I'll likely just do my free summoning circle and walk away. Brave heroes show up all the time and are in the permanent summoning pool. I'll eventually get them through pity breakers.

It really depends on how good they are and if it's worth to get all of the units on the CYL banner. If their good i would save all my orbs if not i could always just get them by sheer luck in the summoning pool

You guys forget that we probably wont know their stats and skills until 1 week, maybe 2 before the banner.
By that time its too late to save orbs.

15 for one circle.

Four unit banners have trash 5* rates, and they reran last year's CYL heroes constantly. I'll pick them up at a later date if any of them are good when they're on better banners.

500 or as many as possible. I have 280 now.

I'm only planning on getting my free Celica. Depending on how broken the new skills are I may summon with whatever I have but neutral Celica is my only goal.

If i skip the next legenderary banner, maybe 300 orbs or so.
And if the new CYL are not great, keep for the following legendary banner

Legendary banner prediction :
In grey pool we will see L-Robin (already get her) and some other grey units. Only wf hinoka is appealing for me.
For the red, i'm expecting NY-camilla (not really good). L-Ryoma is ok. The third one should be cavalry Chrom i guess (still meh).
In blue, maybe the new legendary hero would be reaaaally good. I'm expected Ishtar (great unit).
And in green... L-lyn don't worth it. W-Lissa is great but i already got one.

I'm expecting to want 2-4 out of 4, so 200-250 is a pretty safe bet. I'm basing my expectation on CYL1 - B.Lyn, B.Ike, and B.Lucina are the units I want, and Ike is the only that I really want multiple of. I'll pick up the extra copies on some future banner; one copy of the others is worth pulling for, at least until I'm down to 1/4.