hmm to be honest empowering isn't that hard since once you have the first summons they can get you the most powerfulls with about one empowerment I think.
I'm going to up the cost of all summons a bit in addition to all changes I wanted to do before and then I hope it's balanced.. 
I don't mind the higher summons to be a bit hard to reach since they are pretty powerfull anyway... for most situations they are probably a bit overkill anyway 
 
you can get 3 of the first "level" of summons as multihero's
This nation can basicly use a good bless for the endgame summons but will have a harder early game then since they'll need good scales too (prod and order) and luck can be very usefull with these relatively powerfull hero's
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