Honestly I am no help really, even with 2 g3 accounts lol. I can advise how to "game" the current system to stay in g2/g3, but not so much on real strategy as I haven't actively done tag last 2 months and the difficulty has risen exponentially...
But you do have a solid enough roster to be scary enough on defense to not get attacked, so unless you want to spend hours in tag...
1. Continue setting weak defense today through CvC. Farm solos, use gems for a few refills. Put defense back in with 8+ hours left in CvC while still plenty of solo to get into green.
2. Just do 5/day or whatever time permits thru weekend. This leaves me on border of green usually and if I have time on Sunday I can make some effort on offense and usually get to green.
3. Occasionally this gets me to G4. In which case, I leave solo defense all week to farm and replenish bars.
4. If going to be busy, set full defense all week and just stay green.
With your roster, I doubt you ever fall below g2 now. G2 is way easier than G3. G4 is ridiculously difficult for me...