What to farm in Special Guild Currency Store?

Doing the legwork now will payoff in the end. I’d start hoda.

Wampa let’s you Solo HAAT.
Hoda let’s you die against Bastila teams.
Hoda May be required for a future Luke release - speculation

Hoda is rumored to be needed for an eventual Jedi Luke event - but who knows if and when that happens. Hoda is great with the right supporting cast. Wampa, on the other hand, is a single character wrecking crew and you can get a ton of mileage out of him if he is geared up with mods.

I'd get starring Hoda and Wampa out of the way asap.

Hoda and Wampa are part of one of the best P2 HSTR teams, and both (very) good in various other situations. They should probably be your top priority in the guild events store, as you can't actually get them anywhere else.