YK as a stand alone will give you good results, I would run it for more than 4 weeks tho. I have done 2 cycles in the past at 8 weeks 15mg/ed and felt great. I'm not sure what your able to get your hands on, or what your trying to accomplish with your cycle (bulk or cut), but I'm currently running YK and halo for an 8 week cycle and it's awesome. I'm 4 weeks in and put on 7-8 pound so far. If you can definitely run it with a test base, it will give you way greater results. As for PCT, if you just run YK as a stand-alone I would just take a test booster and low dose nolva if you feel inclined but yk isn't very suppressive so you might be fine with just a natty test. If you add anything else definitely add nolva to your pct.