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

I’ve already written about it, in my opinion, it’s a great ability for those who appreciate aesthetics. It’s difficult to upgrade, and you can use it rarely. IMHO, it’s needed in a long campaign where, for example, you need to complete missions at the end without castles. So, we’re waiting for an add-on from the developers with a super campaign. You upgrade Necromancy, Dark Magic, Power, Logistics, Leadership, and Education with a Necromancer, and I can’t be defeated.