crucible kills are 1 for 1% Ability kills in crucible always net 1% PVE kills are a bit slower but a good tactic is to try the dreadnaught or earth in a zone where the enemy moves against each other. You and a buddy can sit at one of the spawns and just trade off supers and orbs to mass kill things. kind of like a loot cave mechanic but youre not doing it for loot. you get a nice chunk of ability kills. Certain strike bosses too have nice add spawns where you can work with other people to trade supers and get it done a bit quicker. So both pvp and pve are pretty good. Also forgot to mention that Mayhem playlists in the crucible are awesome for this too. You constantly have abilities and supers

you can not gain any sort of rep or experience towards bounties or quests completing raids such as crotas end. it also would have been smart to check your percentage bar every now and then.

I just went to Venus and fist of havoc and lightning grenade the enemies that spawn in the magic hall. Still took like 45 minutes.

Try the crucible. It seems to charge faster there

It moves slow for me on solar, but you seem to have a bug. I played last night for three hours with two melee and two grenade charges running at all times, and popped my super every time it filled and it still took 2 hours to get to 60%. Obnoxious.