You could try putting some vegetable oil into the cap with the hash, not sure how effective that'd be but i'm sure it'd be a little better than taking it without any fat. But if your looking to really potentiate it, I would suggest getting your hands on some lecithin (liquid or granulated, liquid if you cant apply much heat) and throw that in the mix. I've noticed that adding lecithin to my edibles makes it so a lot less thc is required to get high. I guess it helps make it more bioavailable by increasing its solubility (lecithin is an emulsifier).
My overall suggestion would be:
Put the hash along with some kind of butter or oil into a small glass container, like a jar, and apply a little heat (you wont need much since youre essentially working with pure thc) until the hash is dissolved into the oil. You really dont even need heat but it will greatly speed up the process. And if you can get some lecithin at your local health food store then that will definitely make a noticeable difference. Also, lemongrass essential oil contains myrcene in it which slows the metabolization of thc (mangoes have myrcene too, which is why people say they make you higher). So if you wanna get super fancy add at most ONE drop of lemongrass essential oil per dose, as it is very very potent