How to develop through the skill wheel on the path to the ultimate ability

Hey guys, I have this problem. I'm playing as Sylvan and leveling up the super ability on the skill tree – everything seems normal, but... the skill tree has a path through light magic (logistics and luck are leveling up perfectly, without any problems), as those who have seen it know. So, here's my issue: after getting the Storm Wind skill, which is supposed to grant the Refine Mana skill, which is key to getting the super ability, I get stuck. The problem is that Storm Wind unlocks Fire Resistance, not Refine Mana. Other skills in the light magic school also don't grant Refine Mana. And how do I get it? Or maybe it's not even needed – maybe my skill tree has an error. I didn't download the skill tree; it came on the disc (a licensed copy!) with the game and two expansions (gnomes and orcs). Has anyone else encountered this problem? If so, please write how you found a solution. And even better, if it's not too much trouble, write out the complete skill development paths needed to get the super ability for the elves. Thanks in advance.