Getting back gnome faction from killing in SolA

[Melodyy]

Hi,

I stupidly ruined my gnome faction in SolA and need to get it back. I can do quests over and over no problem if that's the best way, or kill mass mobs--I'm lvl 38.
Specifically I need to improve:
1) Gem Choppers
2) King AkAnon
3) Merchants of AkAnon
4) Solusek Mining Co.

For the first two I went to kill Mino's in SF but it looks heavily camped and not that many mobs. Any ideas how I can tackle those four factions?

Thanks!