More clarity needed for windspeaker's blessing
Windspeaker's Blessing caught me on my first try at using it. Outside of the game it says that it increases shields/heals by 10%, and if used on allies give 15% resists as well. That's fine, but when I want to play a selfish self healing/shielding champ, I might decide to take this mastery just for the 10% and screw the 15% resists, then end up with a totally useless mastery ingame. (it conveniently mentions "excluding yourself" in the tooltip ingame rather than while you're setting up pre-game).
Perhaps use the ingame tooltip for its description as well? I'm fine now that I've noticed it but I think it's misleading enough for others to make the same mistake.
It would be reasonable to assume that the 10% increased shield/heal strength applied to all heals/shields, while the 15% bonus resists was an addition that only applied to allies.