I don't play a DGT but I do play a CU22 with a fixed bridge, and a CE22 with a vibrato like your DGT's.
I'd try 10's for a while and then maybe try 9's too.
11's are just too heavy for me to bend comfortably. 11's were too heavy for BB King too. He used 10's.
I think most players who bend strings use 10's or lighter.
Right now I use 10's on my guitars with a fixed bridge, like my CU22, and 9's on my guitars with a vibrato, like my CE22.
I use 12's on my acoustic guitars but that's a whole other thing.