[Agrajag]

IIRC (and I've said this several times), the bug is that when casting global spells with a discount site, the strength of the global is determined by the total cost as if there is no discount. So if you took a global that normally costs 80 gems, got a 25% discount from a site, and then added 40 gems for strength, for a total gem cost of 100 (80*0.75 = 60. 60+40 = 100), it would be exactly as powerful as the same spell being cast without the discount and with an extra gem investment of 20 (80+20 = 100).