[MaxWilson]

I wouldn't use the skull on researchers, since they gain experience from researching anyway. They usually all end up with one star quite quickly, and two stars (50 xp) will take forever even with the skull.

I've been meaning to check and see whether the skull gives experience to your troops too, like that one site, Academy of War. And... unfortunately it doesn't. I might use the skull for precision boosts to mages, but nothing else and probably not even that.

-Max