Guild Wars 2

I would say dungeons, but with 30m-1h you’re not guaranteed to finish.

Because of that, I would suggest to just focus on finishing your PvE daily every day (at least 5) which will net you 35% of your current level not including doing the actual activities.

CoF path1 can be done in 20 mins

You’re too low for CoF, and to be honest most groups will only take level 80s into dungeons anyway. Have you levelled cooking to 400? You mentioned jewellery 70-80 but I believe cooking is still the cheapest method so if you haven’t done that look into it.

Cooking. Like said above.

Cheapest, pretty easy, and quick 10 levels.

Otherwise you could just level. It’s not exactly hard and it’s better as if you ever want to go for map completion etc. you’ll be screwed on the character that you levelled via crafting.

Do your dailies, as a previous poster said. From there, explore Fireheart Rise or Mount Maelstrom, which will give you the most exp at your level.