Deathwing
<Bronze Donator>
I know you haven't had much luck with grift keys, but next time, purposefully tank the trial. And almost tank the ensuing grifts until you have all the gems. They are very high drop rate from the guardians and they won't drop one you don't already have unless another character has it on them.I have no idea about good gob hunting locations. I could use some gold honestly, spent a shitton last night combining gems, rerolling, and crafting couple new things on my monk. Haven't gotten to play with it yet but it looks like a significant upgrade (smite legendary gem socketed, multiple set bonuses now, boost to SW % damage too). I need to find that lightning gem so hard, and a better ring to put it in.
I'd also suggest doing this to upgrade gems until the upgrade chance gets very low. No point in running a max level grift if you're just going to add 3 ranks to a level 0 gem. Unless there's some correlation between grift level and loot. I haven't seen one so far.