Erde doesn't increase AB damage. Erde is nice on MVP because lots of MVP are large, Erde is a mace 100% to large RTE is sword 75% to large. Erde is also nice because it does not break.
I have +12 3x AS RTE because it is better for all around, CCs mvp and non-MVP pretty well. The Erde is better CC for large, even with AS, but Erde's need to be EA10+ to beat RTE in most cases. You will see an increase in CC and AB on MVP if using AK cards, no matter your weapon. The increase from AK is more noteable on CC than on AB.
If you plan to go RTE, go 3x AS. Worry about an Erde later - RTE is a good weapon for a long time.
Edited by Havenn, 13 April 2015 - 03:36 AM.