You have 1 min to scout.
You have 3 mins to attack.
do you really need 3 mins to attack? it is not a mind blowingly complicated ... i just want to get it over and done with ... and come back again in however many hours ...
make it really interesting ... 1 min attack time ...
Sometimes (Many times actually) just one troop remains , like an archer or bomber that contributes 70% , very slowly. Having shorter attack time of about 2 mins is OK, to stop such pesky attacks where the last troop survives by luck and deals massive damage.
There will be more BH levels do you possibly think it could be needed then?