Confused on Elemental Mastery. The actual outcome from it.

So I am struggling a bit dealing damage...unless I use Dark techs, which no matter what do insane dmg. Not a fan of dark techs personally though, so am curious. The Elemental mastery on trees says "Increase [element of choice] by 105%" all the way to !20%... Now does that mean any tech of that element will do 105% more damage? or is this 5% more?

5% more; it is shown as 105% since it is a damage multiplier. If you were to get Mastery 1 and 2 maxed it would be calculated as 100%(for your base damage)x120%x120%=144% rather than 20%+20%=40%.

Ahh, thank you!