thank you for the replys!
The power fist is a bit of a waste I'll admit but I had 15pts laying around so I went with it just for the heck of it although I could trade that and the GL's for 3 plasma guns.
As for the demolishers they are already kinda modeled like that so they are stuck that way I guess but I'm a fan
. I dont hesitate to move them when I need to and usually shoot off the demolisher cannon and a plasma cannon and the las cannon is just there for additional ap2 to avoid any pesky sneaky wound allocation. Besides a large blast and two small blasts kill orks just as well as heavy bolters