You could also house rule the power, such that the secondary attack of Charming Kiss automatically also applies the dominate effect. Which is probably what I would have done if I was designing the succubus from scratch.
Though, if you look at the tactics section, she uses Dominate, and THEN Charming Kiss.
Also, in most cases where I have used a Succubus in an adventure, it is as a "boss" or "mini-boss", which means I would likely bump her up to an elite or solo, giving her at least 1 action point. If she spends that the first round, you can have a dominated, kissed target that round.
Honestly, though, this is something that has come up for me with most of the domination/control type monsters. Dominates and Charms are almost pathetically weak in this edition.