Please help with this build: E/D "Demon of the Sand"

I made a new elementalist PvE character, and I plan on making him a melee earth-type. I've been working out a build for him, and I'd really like some help to get it as good as it can be (I don't have much experience with Eles). Here's what it looks like so far:

[skill]Mystic Sweep[/skill] With 4 enchants, this deals great spammable damage.
[skill]Shockwave[/skill] Since this is a melee build, your targets will often be in melee range, causing this to deal 189 damage to all adjacent foes every 15 seconds, with a 3/4 second cast and low energy cost.
[skill]Victorious Sweep[/skill] This functions as a good normal heal to go with the regeneration, and the more people you have on you, the more it heals. You'll very easily have greater health than anyone you hit too, 'cause of the great defense.
[skill]Grasping Earth[/skill]This works much like an AoE cripple with a very low cost and cast time, with a very long duration, and since it's a hex rather than a condition, it's much harder to remove. This allows you to prevent any of the multiple enemies you'll be attacking from kiting you. This is only useful in PvP, so it should be replaced with something else for PvE.
[skill]Armor of Earth[/skill]This grants an amazing amount of extra defense very easily, putting the ele up to 122 armor against all types all on it's own. And at 16 Earth Magic, the speed loss is negligible.
[skill]Stoneflesh Aura[/skill]With the armor rating from the other enchants, you'll almost never take more than 33 damage, except through +damage skills or spike spells. This will reduce almost all damage taken to 0 (does it affect +damage?)
[skill]Stone Striker[/skill]With Geomancer armor, this will effectively up your armor by another 20 (142). And because it uses the actual armor worn for that extra defense, it bypasses the Multi +defense cap. This also makes a good cover enchant, until you have to reapply Stoneflesh Aura.
[skill]Mystic Regeneration[/skill]This removes almost any worry of degeneration, which would have otherwise been a serious worry since it's not affected by +defense or damage reduction. It will also quickly heal any little bit of damage you take. It also only requires 3 points in Earth Prayers to get 8 regeneration from it.

The attributes should be-
10 Scythe Mastery
12+4 Earth Magic
7+2 (the major rune basically works as 3 attunement runes crammed on one piece of armor. The -35 health shouldn't be a problem with this builds defense)
4 Earth Prayers

The scythe seemed like the obvious choice to synergize with the high energy and enchantments used by the build, and it also allowed me to take advantage of Earth Prayers, which go well with Earth Magic.
The idea behind this build was to give it unstoppable and nearly absolute defense, then giving it as much melee damage as possible after having achieved that. I'm not going for an ordinary "invincible" build though, since being able to take any amount of damage is totally worthless if you can't do enough damage to actually make yourself a high-priority target in teams, or enough to harm someone faster than they can heal when your playing solo so you can actually kill them.
After deciding on the scythe, I also realized that I should take advantage of the AoE ability, which combined with the great defense, would allow it to also function as a great solo/farming build.
I plan on using this in all areas though, PvE, PvP, 1v1, and Farming. I'll just make small variations for each.
Keep in mind a lot of these skill descriptions on those icons are a little screwed up, even the icon on Armor of Earth.



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