Good thing I have Ninian as a bonus unit. Should I bother drawing at least one LA unit?

Do it, those units are amazing. I'll even channel some luck for you. Just look what I got on my very first summon! This banner is ridiculous!

I’m still going, at 3.75% pity rate right now. Need more orbs for the next round to summon though.

If you just want them for bonus unit then no.*unless you are some mega whale

If you actually need the units for your teams, yes.

Still trying to break my pity % with F2P orbs. I can get about 20 from the daily stuff, including infernal challenge quests. I'm at 4% now.