The script as it is now doesn’t allow for that, but I can’t imagine that once Red Hook releases their modding package, that something like that wouldn’t be included.
I could see how a skill like you describe, a A once, A twice, then A a third time could be useful or interesting. A .heal 1 2 skill, with 3 applications could be a useful addition to a vestal package for example, or even a similar attack pattern that does 2-3 damage (application 1), 2-3 dam. (application 2), and 2-3 dam. (application 3) something like Dungeons and Dragons Magic Missle Spell at 5th level.
I suppose we will just have to wait for it.