You got it. I'll just add that as of the current version skills are less of a pain in the ass, as you can use multiple medals with the same skill to increase the chance of success. Also, you can level up a medal's skill by fusing another medal with the same skill. Scrooge has a 100% attach rate for skills.
Getting back to the special attack dots: they first show up on three stars and increase with each level, 3* has one, 4* has two, 5* has three and 6* has five visible. If you fuse into a fully filled 6*, then you get a random guilt bonus, which uses the sins of the heartless to inflict more damage to your foes.
Which makes a hell of a lot more sense with the recent revelations in the browser game...
This is one of the few things that's more complicated than the browser version.
It looks like the war is about to start.
Also, I just got me ass kicked again, so there's that. There's a such thing as an unwinnable battle in this game. Or at least there is in the browser version.
Do you get combined dots when fusing? So if I want to make cheapest 6* with 5 dots I would need 5* with 3 dots and another 5* with 1 dot?