Who should I use a Tier 2 Selector on?
Mantis, Hulk, Skurge, Hulkbuster, Titania, Hellstorm, Yellow Jacket or Star Lord?
If they have a good uni, I can probably pick it up with the sale.
I don't need any of them for ABX or whatever. WBU though would be nice.
Hulk & Starlord uni's are a must if you plan to use them... for anything.
RagHulk can do Proxi WBU
Infinity War Star-Lord is actually decent at WBU, and is surprisingly great in Timeline becsuse of the way his i-frames work
Do you have T2 shuri yet?
Mantis adds 20% crit damage and 15% ignore der to all allies with her Tier 2, so she is the only one of those who will help at all with WBU.
I don't think any are particularly useful for WBU.
Hulk and HB I know you'll need costumes for, so probably not those.
Skurge or Titania might be solid choices. Both combat villains, one female. Might be useful for Shadowlands or something.
None of those characters are good for WBU