The gold per stat ratio between the Warlock and the Crabomancer is in the warlock's favor. Also, Warlock only needs 25 mana to summon, while the Crabomancer needs 50. Starcaller's mana buff increases mana regen by a flat amount, not a percentage, so warlock is always better with this synergy.

Personally I'll upgrade one or two just for a tiny bit more dmg / tankness but ultimately yeah just spamming them is better

Thank you guys! Makes a lot of sense

@@Dr.EscheR. Basically have a decent tank line but focus on ranged damage and your tanks will die but there will be a breaking point where you will just replace crabs with crabs while you dps melts the rest of the units. So basically focus on ranged damage after you've got some decent tanks then just spam warlocks