I have a thief, level 10, which I wouldn’t mind using to help you out if you’re on Isle of Janthir we could team up.
The only way you can change skills on your hotbar is to select a weapon. Every weapon has a specific set of skills. You cannot change what skill # goes to what skill.
Thiefs have the interesting difference that one skill usually shows up only if that specific weapon is in your main hand and you have nothing in your off hand.
This profession is still much like the glass cannon from the Assassin days of GW1, but the stealth abilities do help in confusing human players and breaking off aggro from computer mobs.
Elona, Land of the Golden Sun….and undead…and poison. The travel brochure lied okay?!