Grind at Level 20 Guide in Aion
At that early of a level (aion gold) you are probably better off doing quests rather than just plain grinding. If that doesn't suit your fancy, however, you could probably get into (or start) small groups and just grind Black Claw village or outpost.
If you have a bunch of quests still to kill elite in the Black Claw area, then advertise in LFG chat to find a group. Its good experience, some of those quests give nice gear and some of the mobs in BC have nice gear drops, and by the time you've finished all of that you should be able to start Morheim with no problem. Or you can just get another BC group and keep doing that for a while in Aion.
But yea, that is best option, and everyone has to do the BC area anyway for the Campaign quests so you'll get a group just fine. We would say the early morheim quests and the easier Brusthonin quests. All level 20-22 mobs in the easy parts. Soloing as Glad means resting after most fights, using pots, or odella powder.
You have that even at level (aion kinah) 30 or better when you have better skills and armor. If you do not have to patch yourself pretty frequently then you are grinding in a low xp area for your level. The only place in Altgard for you would be farming all the different spirits around Impetusium. You shold get decent xp for them without too much difficulty.
