PoE Juggernaut, Lightning, Mapping builds with custom stat filters

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 wanted to share my current build - a very tanky variation of something I built after being inspired by That's Real Neato. Aegis Aurora, Cerberus Limb, and Nature's Patience cluster jewel, plus a channeling skill to take advantage of standing still. Determination for armor, and Juggernaut to get freeze/root avoidance, endurance charges, extra armor, chaos res, and life regen. Leap slam with faster attacks, accuracy gem, and fortify to move around more easily and pick up fortify. The damage output is not extreme, but it's been enough. The mapping is ok, but not zoomy. But standing stil