Okay, Ms. Cyclone's got some neatarino tiparinos for you!
-Do quests in Eura, those tend to have the most XP and items.
-XP boosts are worth it.
-Don't touch the fire from any boss with 'blazing' in the name.
-Right now, I think Moon Shadows and Moon Warriors are the top two councils when it comes to player activity.
-Use the mobile game, you'll have fewer problems with crashes and it should load faster. Android works the best.
-Once you unlock it (level 40), use unique armor. It's snazzy and helpful! But if you ever get to the point where you can get Green Gaurd armor, just know that the boosts on it aren't the best. I typically use Golden Sky, but Meteorite (the stuff I'm using right now) is also really good.
Oof, I'm an SA game dork.
If you ever see me online, feel free to friend me and invite me to a coop quest!