Armadas is how I’ve been charging my cube too. I normally do the dominion solos. I have a tier 6 cube so I hit the 46 solos and hit the 46 explorers. Works great.
Level locked at G4 Rare, currently my method is to hit 2 capitol traders (I use Kronos), then go to Ursva next door (5s warp), hit a 39-41. Rinse, repeat. It takes care of my 20 faction hostile daily and gets me 2 chest pull easily (900) and often the 3 chest pull (3000). But its just part of my dailies. I use the Borg Cube with my armada crew just because its usually idle.
