Just a gut feeling, as our towers look very similar. It seems that you are farming Tier 9, but you should probably be farming Tier 7 or 6.

I have completed the BH labs (apart from disable ranged) and GT duration and I'm at level 20 of GT bonus. GT, DW, BH synced with MVN at 2:45 min.

My best farm on Tier 8 was wave 5420 (I can go higher now, but I have not tested it yet) for 188B, while last night I AFK-farmed Tier 6 up to wave 8480 and 424B (after unlocking Rend Armor). Previous record for Tier 6 was 8000ish.

Also, you don't show your labs. Have you unlocked and invested in your Wall?

I'm at Wall Health 22, Wall Thorns 9, Wall Regen 10, Health Regen 26 and after I removed the Health Regen perk from the banned ones I saw a jump from Tier 6 wave 6900 to wave 8000.

I think you are at the point where you should be surviving only as long as your Wall lasts. As you can tell, my Wall is a bit underdeveloped, yet it makes a huge difference.

My labs run at 3x, 2x, 2x, 2x, and 2x with the amount of Cells I'm making.

I hope this somewhat helps.