How do you expect the Rooks and Knights to be able to take a base when the Bish up so many defenders that it takes 20 minutes to knock them all down and the hangars are only down 15?
Ok here is a base taking strategy that guarantees success.
1. Up 2-4 fighters with cannons
2. up 4 attack planes like 110, or p38s
3. up 2-3 bombers (may not need them)
4. bring goon.
Go to enemy base. Immediately knock down the VH and radar.
send your attackers to De-ack the town and start bombing/strafing the town. 3 P38s can take down a whole town.
Use the fighters to stop any uppers and keep Vulch/Cap on base.
Do your best to get everyone to kill Ack on the entire base and town.
Send in the goon once all is clear.
This will take 10 minutes if your whole team does everything correctly.
You don't have to kill HQ or kills FHs to take bases. It simply takes a coordinated 6-12 people (sometimes less) to kill the town and stop Vehicles from getting out. Enemy Vehicles are wayyyy more crucial to not taking bases than planes are. Keeping a vulch cap is simple and you can use more men to take down the town.
And one more thing. You don't always have to take the most popular field. Killing the FHs on the field that has the biggest furball doesn't always make it easier to capture a base. And most of the time this does nothing but kill the fight and people's fun, when trying to capture these types of bases is the most illogical form of strategy on the map.
You have to go for bases that have no action and are not busy. Go NOE pop up, do what I said.. and BOOM. Easy base take!