While Arc is definitely the most powerful GB in the game (so far) because of how it changes the way you can earn FPs, medals, and BPs Traz is far more effective for actually playing the game.

Traz will benefit from the reduced recruitment time just like your other troop barracks, so if you’re the kind of person who times it just right (or your guild is of high enough level), you may get to collect it twice in one day without the benefit of double-dipping as you level! That’s never a bad thing! In addition, Traz works off your guild level, in that you don’t have to wait 24hrs for it to produce like with other GBs. GE helps, for sure, but you’re limited on how many you can earn a week, whereas Traz will just keep plopping troops out for you. This single GB is the key to sustained work on the maps, because troops are not something you can just easily get, even with the addition of GE. The reason being that having Traz means you can both fight extensively, or you can be far more effective at laying DAs if you’re not a fighter. Alcatraz is without a doubt the #1 game changer for anyone who is in a GvG based guild, regardless of if you are fighting or farming.

Forge of empires alcatraz formula