Rag Viking Bay Pearl Cave Base

So I found this nice underwater tek vaccum base in the pearl tunnels on rag, they have a nice death wall with half turrets on players and tames which i soaked with turtles, and then the other half on only players, turtles clearly wont work but when i go to use the stegos i get shot off everytime by the tek turrets and ive died multiple times losing stegos and capped saddles any tips on how to raid a base in this spot?