I will be holding a playtest session at level 14, 35 PB on Thursday, hopefully the first of many. Four benders and one Tier 3 class as a ruler.
Some new feats I'm tossing around:
Form Mastery
Through much training, you have managed to master an additional form.
Benefit: When you first take this feat, you gain Martial Lore as a class skill for all your classes (current and future).
Select any form from any discipline which you currently have access to. Provided your bending skill is high enough, you learn the form. Your first forms learned of any discipline must be the fundamental forms of that path; all of a discipline's fundamental forms count as a single seed for the purposes of learning them.
If you have not taken a level of any bending classes prior to taking this feat for the first time, you are considered to be a member of the class associated with the form's discipline for purposes of determining discipline access.
Special: You may take this feat three times. Each time, it applies to a different form.
Special: A Fighter may select Form Mastery as a bonus feat.
Open-Minded
You have opened your mind to all the possibilities that the world contains. You do not merely accept or tolerate ideas different from your own, you merge them into your consciousness and they become part of you.
Benefit: Whenever you are able to learn new bending forms, you may learn them from any of the four disciplines. Your first forms learned of a discipline must be the fundamental forms of that path; all of a discipline's fundamental forms count as a single seed for the purposes of learning them. You may take this feat even if you cannot yet bend.
Special: Characters with the Avatar template start out with this feat for free. In most circumstances, you need a teacher to help you start the path of another discipline.
Special: In a canon setting, this feat should be highly restricted.
The more I look at Ski the more I think Waterbenders need something else in its place. It's the most boring and not-useful movement mode. I'd stay in Fire for better Burning Rush, Air for Evasive Roll, Earth for being basically unmoveable by 20. Water, if there was a PrC available, I'd probably want to get out of it by 10-12.
Eh, I dunno. On the other hand, Water Conservation is potentially very useful...