I can think of a few cards that might be fine for revolutions. 
Finland
Emergency: Karelian Jaegers harvest resources 100% faster.
Hedge: Karelian Jaegers have 100% more Hit Points and deal 25% more damage.
Perú
Elite Guard: Peruvian Guard get +2 LOS and gets a charged grenade launcher ability on their grenade attack with +2 range; their siege attack gains 5 additional range.
Brotherhood of War: Huaracas, Revolutionaries and Peruvian Guards gain 30% Attack and Hit Points.
Brazil
Incentive: Allows you to invest coins in urban centers to speed up the training of revolutionaries by 50%.
New Guard: Independence Dragoon and Jagunço get +20% hit points and attack.
Chile
Homeland Volunteers: Send 7 Hussar of Death and remove their gold cost.
Donations: Town Centers produce 3.00 gold and food per second.
Argentina
Argentinian Barbecue: Livestock pens automatically gathers up to 3 fattened livestock in a radius of 16; Livestock fattens 35% faster when tasked to livestock pens.
Presidential Artillery: Allows you to improve all artillery at the imperial level.
Cards for all revolutions.
Civil Order: Allows you to recruit revolutionaries and equivalent in barracks and fortresses, revolutionaries gain 25% more hit points.
Changed Weaponry: Revolutionaries and equivalent gain 25% damage
Legacy Arsenal: Professional Gunners, Trunion, Pillage, Military Drummers, Flint Lock, and Paper Cartridge available at Arsenal; Arsenal technologies are free.
Advanced Industry: Factories get +100% hit points and are repaired for free; Cannery, Water Power, Steam Power, Mass Production and Imperial Cannon upgrades are free.
I think it’s pretty obvious, but this is just an idea, not a request. 