4-AD can raise hematocrit, assuming you use "enough". "Enough" depends on your method of administration, as well as amounts, in addition to your unique biochemical response to the introduction of the ergogen. Still, it will not top the real deal. Won't equal it, either, in most individuals. I'd really, really, REALLY advise you to use the real thing in this case. Anything less, for this, IMO, is half-assed.
Dehydration only raises hematocrit in a relative sense. It would cause less blood volume with the same erythrocyte count. That won't help you at all. You should be adequately hydrated at all times. If you are to increase a hematocrit reading for wound healing, you need to cause an actual RBC number increase.