I've been playing this type build in QM (HL results may vary) I traded out the Elunes grace for strangle vines at level 7, because While elunes grace helps you keep a safe distance however the same goal can be achieved by way of proper positioning and awareness and would much better be suited for the extra dmg catching anyone in your root gives, which helps clear lanes or take camps as well as punishing an enemy team that groups up or for just picking off someone you happen across in a dark ally and think they actually have a chance against you. also instead of nightmare as last talent i chose Bolt of storm as I find its use with the ulti to be quite effective to blink into the group and drop the bass to finish them off. ideally use this as a solo que because in a premade I would assume my teammates can do the dmgs and i would go full heal. You guys might try it out and see how it feels, it just makes you feel really threatening!

Idk the amount of no-damage from him 3on1 vs Johanna with a few heal support is just laughable...
But yea if the hero suits you, I think your guide is good! Thumps up

p.s. Imo the biggest strength of him is his versatility and should be build towards that which requires a good ability to adapt his build to each matchup; hence he should never be labeled an easy hero.
- so imo Hardened Focus is a big strength which buffs every spell; Full Moonfire Suits that perfectly - if you want to go more offensive as in this build.