Potential combo: Cloud Rider + Clockmaker will permit a full six hexes of movement a turn that can't be reduced because of Mobility, a pre-requisite for Cloud Rider... and all at no cost.
Actions are limited to a maximum of 2 per action type. So even if you had 10 AP's, you can only use two movement actions. This is a easy rule to enforce because it's impossible to submit more than 2 with our action submitting form.
I believe Cloud Rider should be reduced to 1 use/round only. That is still 1 hex more than anyone else.
Cannot be done. Otherwise would have a a weird special rule just for that skill.
Wouldn't be that hard to to, just add Cloud Rider under movement as if it is a free, but activated skill, but only at one of the two movement dropdowns. That would still allow only two movement actions, of which only one can be free. That would be good enough, because you could still run at more than normal speed that way, or run at normal speed while capturing (or something else) every second hex. You could even pass by in a town and do some trading
If the drop-down menus are different, it might get complex. Do we really need to change the whole action submitting process because of one skill? There are other, more simple, ways to nerf that skill. If nerfing is needed that is.
But whatever happens, some changes are needed. My basic rule of all skills is: No skill should become obsolete after you take some other skill. Currently some skills, like Cloud Rider, have this problem.
Different drop down menu's? Is it that hard to add another option into a dropdown menu for everyone. My idea was almost the same as you renaming agressive attack into charge, just add one into the action form, that everyone can see, but only people with that skill could use it.
About the nerving, it might need testing, but being able to use it two times seems a bit too much.
On the other hand, it is a tier three skill, and so far the fast travel looks to be: tier one: limited but fast
tier two: open, little faster than normal
so tier three needs to be faster than tier two, as it is open too, meaning it would have to equal 4 moves a turn.
Maybe make it instead of 2 hexes for 1 action point 4 hexes for two, that equals the same if you want to travel fast, but it means you will have to slow down if you want to do something.
My point is, you either need to be able to travel really fast (so when putting all points in movement), with a good if you want to use other skills, or, when the drawback is less, the speed should be lower.