Vik 9
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By the way, once you have acquired the 4 necessary primary skills, you should then acquire the secondary skills you need. Leave an empty slot for a primary skill (if the hero allows it) as a precaution. Otherwise, the game might surprise you by offering secondary skills that overlap with the ones you need. In that case, you can fill the slot with a primary skill (even if it's not the one you need).
If you fill the empty slot with a non-essential primary skill, you won't be able to develop it into an ultimate ability.
If you fill the empty slot with a non-essential primary skill, you won't be able to develop it into an ultimate ability.