800 currency for 63 coupons worth of value VS 2000 currency for 125 coupons worth of value, it's blatant what's better.

Moverove every thread you add grant power, while tactics pages don't add anything until you reach the treshold to level up the tactics.

So the answer is threads.

Tactics in the past used to be better, but since 4.0 we have only 5 pages there instead of the old 9 so is not anymore worther than threads.