
The end result is this hybrid build - with Max Skills and Runes for Sacrifice, Battle Chant, Earth Drive and Shield Boomerang. And I promptly used it at last night's woe.
It's surprisingly tanky (even without the extra HP of Goib set), and it's nice to have other useful skills. The downside is that my EarthDrive and Shield boomerang damage still suck...
Like Sacrifice, Earth Drive and Shield Boomerang depend on HP and DEF to up the damage. Still, even with low damage, ED's debuff effects help a lot in clash, not to mention its ability to clear hell plants and land protector. Shield boomerang on the other hand gives defense buff for a few seconds of extra tankiness.
I'm hoping that with the extra skill points I can probably make a Sacri-Shielder hybrid that's actually viable for PVP/GVG.