It appears the cold portion of Tsunami (the bit that scores 0 damage if enemy makes the save) is not hitting at all. I don't recall ever seeing the cold portion of Tsunami work. I am thinking the DC for the cold portion is being calculated wrongly.
Tsunami: Active (50SP to activate) (7 sec cooldown) ...The cold damage and knockdown are negated on a successful Fortitude save vs. 10 + Wisdom modifier + Character level.
My Tsunami works out to be DC of 50 at the moment. But most likely it isn't 50, because even in epic casual, I never score hits.
Also I was very disappointed when I found out Stormrage doesn't scale with spellpower. For 50 SP, it is completely worthless then. This is barely a Tier 2 skill, let alone the Tier 5 skill that it is being recognized as.
Together with bugged Insidious Spore (u kill yourself) and bugged Chill of Winter (u kill yourself), this ED is utter trash.
What a disappointment.
Also the Summon Elder Dryad can cast regenerate (good but she rarely does), instead she uses the lightning strike all the time (a pitiful 90 dmg or so).