PoE Crackling Speed, Orb builds

So I was thinking of league starting as Righteous Fire. The new masteries makes leveling a breeze, but how realistic do you think it is to migrate to this after a week or two? Are these clusters really expensive? I'm a HC player who just farms red maps...so this seems pretty cool to me to be able to play that Auto Bomb style while remaining semi tanky. Thoughts?

I just wanted to post about my build idea and tested since I think its really cool. I've tested Hydrosphere with spell echo and can confirm that the final repeat does have a 100% crit chance and when using it with greater spell echo it also inherits the extra aoe and more damage multiplier. Scion Archmage: This is a (not that good) pob for an archmage scion that I used the interaction with. I stacked cast speed to make the build be able to clear maps a bit more smoothly but its strength is definitely in bossing. I defensive laye

Rambling follows: I've been wanting to run a non-crit lightning build as long as I've been aware of the mastery, but never managed to make a decent enough PoB. I always end up all over the place. I'm excited for the new lightning skills and the trickster rework. Everytime I'm tinkering with lightning builds I'm kinda lost on the main skill even. I'd like to get power out of Orb of Storms, so I'd like a skill that I can spam, but I feel they're all clunky one way or other. And I feel like I'm missing some tricks to get dps up anyway. I'm not looking to make a build that can faceroll ubers, but