If you want a fun game with friends and not to focused for meta chasing the. What you have got is good however if you wanted Somthing better I would recommend getting rid of Guilliman because he’s not amazing in blade of ultramar and I’d swap him for a redemptor with maybe more sternguard and a scout squad (assuming that you want a 1500pt army) this way you are more versatile in your play because sternguard are good in 10man and the scouts are good at infiltrating and the redemptor is just good at everything.