I'm 100% sure we've had max gains at 200% with orcs in age 55...i can tell by the CE, SoT of myself and target all being updated the last 45 seconds of the age.
That age Orcs had + 20% Gains
According to shrimp... a 3 day old sos shows i had+31.00% Gains in Combat (923,289 points + 1,175 in progress) total books....or roughly ~1900 acres with 490 bpa pre war.
Thats ~2300 bpa =>that age=>67% gains for an orc that age. (402 acres)
12*1.2*1.67=24.1% land. Assuming the target i hit had no gbp or GS would mean a 200% land grab reduced my gains at most by 17%.