I'd keep the 150mg/week of Test. No point in raising it, and perhaps getting more bloat or side effects.
Primobolan is always nice, but it's pricey and often faked.
Masteron is GREAT this time of year. 400mg/week should do the trick. Don't run it alone, it's better stacked with something.
Tren. is GREAT. Who doesn't love Tren? If they don't, they should send ALL their Tren to me! Be sure to stay hydrated while on it, and have the proper "accessories" to go with it. (ie Cabergoline)
Equipoise is also a possibility, but honestly, I'd look at the above (3) items. EQ gives nice vascularity, but unless you BF is low, it's not work it right now.
My vote: Masteron + Tren + Test.