One catapult does 42.5 damage every 2.5 seconds (17 DPS). One generator can fit 9 catapults. That means one station can do 153 DPS. And with three stations, you do 459 damage per second. Much safer than using tentacles too.
“Mighty Wolfgang’s DPS with a Morning Star is much higher than 153. On a dry target Wolfgang’s DPS with Morning Star is 173.4 ( base damage, x2 hits per second, x2 Mighty bonus multiplier). On a wet target it’s 289. The catapults only beat him in single-target DPS once you have 18 of them for a total of 306 DPS.“ - Swanky Psammead (Thank you!)
You want to be in the center as much as possible so that all your catapults are attacking Bee Queen. That’s why I’m using Snurtle Shells and a Bee Keeper Hat.
And you only really need about 6 gems to kill Bee Queen with this. I know one catapult is not on, but that’s ok.