Board Thread:Game Discussions/@comment-107.206.49.48-20131220064504/@comment-24026888-20131220105206

I'm pretty sure it's been proven that these double elemental bonuses exist. However, they don't give 100% extra damage for each matching element. The bonus is a bit smaller.

I thought it was something along the lines of 1.5x damage for a single element, and 2.0x damage for two matching elements. Or even 1.33x/1.66x. I'm sure I'll be corrected if these values are wrong. :P