Just got "Three Birds with One Stone" and here some tips, since I feel it is hardest chievo.
In Downtown, get Juliet in your team and equip her with best tommygun you got, "The Chopper" works great if you got it. After following robbers trails, you eventually got yourself into police ambush. This is warehouse map, and you always start in secured end, so duck down and hide Juliet in right corner. You are facing huge amounts on 120HP polices, so use your other troops to decrease their health while hiding (one shot in rifle is enough to take 3/4 health away). When good amount is near and wounded, unleash Juliets Full Auto in those!
Last edited by Reqqu; 02-04-2013 at 05:03 PM.