PoE Onslaught, Chaining 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?

POB (edited after feedback): POB (original): POB only works on desktop client, web one doesn't have skills for some reason. This was originally a BV/EK Stormwall into Fulcrum full conversion build, but then they removed Stormwall so I had to change plans or be left without being able to league start. This is now a Lightning Conduit Agnerod into Fulcrum build that uses BV with Shaper of Storms to shock everyone 7.5 times a second, and Lightning Conduit to deal damage

So i think i have finished my pob of the shock slinger. Gotta replace the 6 link arc with lightning conduit and add overcharge support to the 3 link arc but thats about it. i tried to be reasonable with the items since its a league starter but who knows what the actual prices of these will be. Guessing ashes of the stars might be a bit much like this league but we probably have other amulet options anyway. One other thing to note. According to a poe wiki or something i read that spellslinger always triggers helmet first so there shouldnt be a problem with lightning conduit trying to cast

POB : Maven : I've played Arc with Triumvirate ring in this league, and it was quite decent.Total budget was 20\~25ex iirc. It should be much cheaper now.You can change the helm for Arc chain enchanted one. -10% dps, but much cheaper and better for mapping.Killing end game bosses was quite easy actually. I could kill Feared with this setup. Spell Echo vs Unleash I've used Spell Echo before (with Algor Mortis gloves), but I ended up with Unleash (with Doedre's gl