I would suggest that the skills you don't have for the meta builds you have found, you get.
It will be a HUGE help, not only on the character you are on at the moment but in the future it means you will have good builds for your heroes no matter which character you are playing on.
I would also suggest that you kit your heroes out with runs and insignias as well as the best vigor runes and most effective weapons you can afford.
If you are going to progress through a campaign I would suggest Nightfall, getting the heroes, especially norgu and razah will allow you to abuse two of the strongest proffessions in the game, also if you can get Xandra from the norn fighting tourney. She is a great help.
All this might take you a while but once you have everything set up you will find things become a LOT easier and you will easily make back the time you spent doing this by just steamrolling mobs and enemies like they are delicious little traffic cones!
As for your build, as disappointing as it is for me to say one of the strongest builds you can run is:
*12 Deadly Arts, 8 Energy Storage, 10 prot
*Assassin's Promise, You Move Like a Dwarf, Ebon Vanguard Assassin support, Finish Him
*Any 4 other skills you like though as you are an e/mo I would suggest Aegis, Shield Guardian, optional, Res of any kind
*This will let you abuse these powerful and high recharge heals taking pressure off your team and doing kick ass damage at the same time
I hope this helps, good luck