These are two very good supplements.
Activate is great for what you are looking for. The extra test gain really assist with gains, plus it makes you feel good.
PowerFull may not be the best supplement for you in this case. Some people do report strength and size gains, but not everybody does. PowerFull makes you feel amazing, improves sleep and skin quality, and often will improve body compostion, but I think you would get more consistant gains by stacking Activate with Hyperdrol, Mass Fx, Anabloic pump or X-factor. You should give PowerFull a go some time (you could add it to any stack), but I think for your specific goals, I feel there are better options.