If you are looking to be succesful in reaching kings squad, 'bulking' is not what i would recommend, unless you are below the 65KG minimum weight. Getting stronger, is though. This doesn't mean that you will build muscle, infact, you can loose muscle and still gain strength by doing bodyweight/crossfit exercises, which will be much more beneficial to you. You dont want to be carrying all that extra weight (muscle) around with you in RT because it will weigh you down when it comes to your running.
I dont mean that to sound like a lecture, you probs know all that already.