You wanna heal? Great! You want to tank? Hells yes! Then become a shockadin today!

Not going to go into specifics here cause you are just looking for the talents. Pretty much you get to heal and self sustain using Q for 5 mana. Easy. Stun those fools that come at you.

The great reddit user /u/clonexg provided this great explanation. If you want details read it.
https://www.reddit.com/r/heroesofthestorm/comments/67v0xv/how_holy_shock_makes_uther_one_of_the_best_tanks/