Viability of Mana Tide Totem

[Artega]

Given that Mana Tide requires the waste of ten talent points (Eventide and Improved Mana Spring), I've gone ahead and placed a talent point into Parry. However, Purification continues to look quite nice. On the other hand, I've been told that it's not worth it unless you're going for Mana Tide, which I'm not. Thus, I have two tentative talent builds to consider:

Enhancement - 30 points

Ancestral Knowledge - 5/5
Thundering Strikes - 5/5
Improved Ghost Wolf - 2/2
Improved Lightning Shield - 3/3
Two-handed Axes and Maces - 1/1
Anticipation - 1/5
Flurry - 5/5
Parry - 1/1
Improved Windfury Weapon - 2/2
Toughness - 5/5

Restoration - 21 points

Tidal Focus - 5/5
Totemic Focus - 5/5
Improved Lesser Healing Wave - 5/5
Tidal Mastery - 5/5
Nature's Swiftness - 1/1

And the inverse:

Enhancement - 21 points

Ancestral Knowledge - 5/5
Thundering Strikes - 5/5
Improved Ghost Wolf - 2/2
Improved Lightning Shield - 2/3
Flurry - 5/5
Parry - 1/1

Restoration - 30 points

Tidal Focus - 5/5
Totemic Focus - 5/5
Ancestral Healing - 2/5
Improved Reincarnation - 2/2
Improved Lesser Healing Wave - 5/5
Tidal Mastery - 5/5
Nature's Swiftness - 1/1
Purification - 5/5

Having read several good posts about Improved Healing Wave vs. Tidal Focus, I've decided on Tidal Focus, despite the second build's focus on healing more than melee superiority. Additionally, I find myself casting LHW far more often than HW during PvP combat, which is where my Shaman will find himself far more often than not. The points into Improved Reincarnation are there simply so that I can promptly raise myself and continue healing our flagcarrier, or promptly raise myself and continue to defend a node until reinforcements arrive. It'll also have the secondary benefit of making deaths out while grinding or farming a little less inefficient. Given that the build will be focused on healing (and thus choosing spell crit over melee crit), I felt that a couple of points into Ancestral Healing would go a little way in making me a more effective healer. Additionally, I can remove a point from Totemic Focus and both points from Improved Reincarnation, depending on how useful the Armor bonus would turn out to be.