Ok if you are dead set on doing a cycle, you might as well do it right.
your results would be better if the test was run for 10 weeks, i hesitate to suggest it because i dont think you need to be cycling any way. You also need to run the deca for 10 weeks. Just do the deca and test, no need for primo. As far as your diet goes, consume lots of red meat, sounds like you are an ectomorph. You need to eat all you can eat. Be sloppy with you diet, if you want to gain weight sometimes you have to eat in volume.