Hello Joe! Sure, I'll try:

1. The Rank of a Champion has nothing to do with the Skills upgrades. I mean, you can go ahead and upgrade them all (with the exception of those that you mentioned later, based on the Ascension phase), regardless of the level or Rank your Champion is at right now.

2. There are Skills that open up only at a certain level of Ascension. You need to make sure that all the stars are purple for making a Skill active, as listed in the description.

3. All the Masteries resets that follow the free one cost 150 Gems. The price does not change for all the subsequent ones.

1 no it doesn't give additional levels for upgrades.

2 the skills gets better after usually ascending to three stars

3 don't know

Thanks for your answers!

So i understand it right:

For 1 or 2 purple Stars, i don't get the "upgraded Effect" of the Skill?

I get it after the Champ is 3-Purple-Stars - and for every more purple-Star, the Skill gets better...