Alpha Monkey

So i have an army. 19 theris with 21k health and 800-850 melee on each. Plus mate boost, they deal wbout 650 damage per hit. They all have 100-125 armor saddles and im gonna be riding a yuty. Is it possible without any cakes? Because i dont feel like grinding them yet and want to tick one of the bosses off the list already. If i really need any cakes, would 5 on each be enough? And would 5 cakes be enough for brood? This is my first time trying any of the bosses btw