OK, I understand your point of view.
I like to use AoE and Marigold Skill first to kill the low-HP enemies before my single target strikers hit the other(s). Most of the time my battles last ~3 rounds, I am sure I would use a different order if they would last less or more. Hard to say which order is better, in fact what I have learned for the past weeks of play is that RNG rules the Maps as well as the Battles, so I/we should not bother my/our-self too much with that. But I liked your input, so I will try different orders.