Yeah, I was just trying to help someone else with this.
One thing I'll mention is that gearing GeoSpy is VERY easy. You should be farming Nute and Brood Alpha, but GeoSpy is easy to get shards and easy to gear, and even at g9 can one-shot Padme & Anakin and maybe even FishHead (I don't remember for sure).
On the other hand, you can get it done with g12 Ventress and that squad. Maybe even g11 Ventress and them. But that's not at all the right squad for the event, so if you're adding gear only for this event, best to just jam Ventress to the max and keep trying until she gets it for you. Don't bring GG up to g10 for this event (eventually you want him relic'd but this is your short term plan, not your long-term). Invest all the gear in one toon - Ventress.
Meanwhile, bring GeoSpy along as quick as you can. Up to g8 it will be using very different gear than Ventress, so that's no problem. It's only the last couple gear pieces at g8 that might conflict at all with your Ventress gear. Once you have GeoSpy at g9, you're good enough for both Tier5 and Tier6. For Tier7 you might want g10 on GeoSpy just for survivability ... but you really don't need it since if Spy gets killed you can always start the event over.
So, yeah, bring along Brood Alpha and/or Nute + GeoSpy for Tier5-7. Get Ventress up to g12. Let the droids linger for now.
GeoSpy replaces b2 (you want the buffs on them so GeoSpy gets more bonus damage) and your leader replaces one of the tanks (Nute replaces Sun Fac, but Brood Alpha replaces Magna to keep as many Geos on your squad as possible).
That's it. gear Ventress like crazy, get Spy, and as soon as you can, but after spy, replace your leader with a better one.
Of course, you probably also want to zeta Ventress' Rampage. That's going to be crucial later for scoring a minimum of 10m in HSTR. (Make sure you look up the DeathStorm team before gearing up your NightSisters - you want at least one NS at low-ish gear, and the best option for that is NightSister Initiate, but I've seen people who geared her too soon and now she doesn't work like she's supposed to).
