Hero fest so far

Lewyn +atk -spd is not bad. I have this IV myself and it's better than +spd -HP for PvE (which is probably his most important role, because stuff gets so insanely fast in PvP) because PvE opponents tend to have stupid amounts of HP and less frequently insane amounts of spd

Maribelle: if she's your only, I'd definitely use her until you get her to 5000 HM. That's a 5* healer for 0 feathers, and healers are great in TT.

As for Ophelia, you could do it either way. If you're ok with getting an extra copy on a legendary banner, I'd say pull now because the price you're getting in orbs is exceptionally good and most seasonal banners have 4 units so the price would be excessive. But if you would prefer to play tighter with your orbs and gamble on her appearing with other units you want on a legendary banner, either spend on other colours on hero fest or hold your orbs until near the end of the banner.

Lol what are the odds that we BOTH got more nonfocus than focus and obtained a Laegjarn as one of them.

You have 6 days to decide.
I don't think there's a release date for the Chirstmas banner yet, so don't be too hasty.
If you're disappointed with your Lewyn then he has that ridiculous B skill that on the right unit can make lots of content disappear. Lilina would be a good choice. That other fellow who posted had some other good ideas too https://fireemblem.gamepress.gg/q-a/analyzing-special-spiral

And Maribelle has an umbrella, so give that to your favourite staff user and Mary Poppins people to death ;)