Have at least 7 buddies.
Everyone creates 1 new account (and get the alliance tower) and fill the alliance with the new accounts, everyone else leaves. Do this ~1h before the war starts.
Once the war starts, everyone’s main account join and all new accounts leave.
You will be matched with weak alliances and you can bully them. Enjoy your free Doom Gates.
How to fix: People who join after the alliance after the war starts cannot participate in the war.
p.s.: our alliance is getting bullied like that. 11 men vs 17 men, and we cannot even destroy the gate of their weakest member.