Learning a skill remove another as an option

I'd like to have an hero with 8 skill. Each skill would be paired with another one so that when you learn one, the other cannot be learned anymore.

Example: An hero has some form of armor bonus skill or devotion aura, so he can either get a big buff to himself or a smaller buff to both him and his allies.

I tried giving both skill the same button position, but they just go into another slot and both still show up in the level up window.

er, are you trying to remove and add skills via triggers at run time?

You can't technically have more than 5 hero skills in the hero learn menu.

What you can do is have a "learner" skill for each of the pairs and then choose which of the pair you want after that. It will take triggering to add the choice and whichever of the abilities a player chooses to the hero.

Yeah, I was kinda expecting too much of the system. I was hoping I could do it without triggering the leveling of my numerous heroes. Thanks guys