Back before building HP nerfs Cybran strat was arguably the least powerful one, since it couldn't oneshot T2 mexes (2750 damage, 3k mex HP). This was somewhat countered by its huge AoE making it undodgeable and able to kill huge fields of engies, as well as stealth.
After the nerf, the strat feels a bit too OP in my opinion. It's now by far the best strat for killing infrastructure, often able to groundfire 2 mexes at once. Other than some niche situations like killing structures with exactly 6k or 9k HP, the main disadvantage of Cybran strats is gone.
I'm not providing any rationale for the above since I think it's not really necessary, I think everyone is familiar with strats and groundfiring. I suppose a counterargument could be made that the UEF bomber has just one less AoE, I am not entirely sure how much of a difference that makes.
As a nerf, I'd suggest splitting Cybran bomber's AoE into an inner an outer ring, like nukes are. Details could be figured out I'd throw out two examples:
- 2750 dmg/5 AoE, 1500 dmg/7 AoE,
- 2750 dmg/6 AoE, 1000 dmg/7 AoE.