On the crits x10 server an extremely OP loadout you could try is Tomislav, Sandvich, and Gloves of Running Urgently (gloves can be swapped out)
Go up to the tower with your Tomislav, which has 0 rev up time, and open fire. Because the heavy fires from the head you will be able to shoot anybody you see. It may not be the most accurate, but because you have crits you can put any class down in 1-3 bullets. Since you fire constantly and there is a large ammo pack just one level under you, bullets will hit more often than you'd think.
Yesterday I got dominations against 3 people in a single life. It's pretty OP.