I've build one, and I gotta say its lack luster in terms of dmg. I don't seem to be doing as much as dmg as these youtube vids. I am a newb can someone help? Or should I sell and move on from this?

Most if not all of those youtube videos are p1 where everything is viable. Tesladins fall off quickly, past p3 they are just an expensive merc for sorcs/javas.

Using your own holy shock, offensive skillers, lots of facets and infinity merc will do more damage. You can use for ex griff and a 3 facet gris shield instead, with grief.

Post your items and skills.

tesladins are not that dank