ildaryk
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The Ibba-Marbas pair is quite predictable here, with Marbas having a significant advantage. If you cast the Ethereal rune, you end up facing Marbas with his Fireball. If you cast the Elemental Resistance rune, you end up facing the Devils. Of course, if Ibba's morale drops early and the opponent misses, there's a chance. Perhaps it's better to cast Ethereal first, and then the Elemental rune, which would be more beneficial. Or, another option: position them two squares apart (which you should do anyway), cast Elemental Resistance, wait, cast Ethereal, and then move forward. But I haven't tested this, as I didn't have enough time.
Regarding the Vitus-Axel pair: I can't seem to win with Axel against Vitus. Vitus definitely has an undeniable advantage in this pair, but to realize it, you need to try hard. And, of course, Axel also needs to try very hard to win here. Overall, it's a very interesting pair.