The easiest way I've found is to do this. Get to 70, bring along a 70 pally (2 piece T4 healing set preferable but fine w/o), Go to Blasted Lands, pally judge JoL on one of the immune mobs and autoatttacks to refresh it, auto attack with the toon you are trying to level up your wep skills/defense, go afk.

For 2h wep skills try to get the fastest 2h of that wep type you can so you don't need to check on your toons as often. JoL is not bases on ppm but rather chance on hit so faster weps are better. If you're Dual wielding you should have more than enough healing and be able to go afk indefinitely. While you will auto afk eventually, you will not auto log due to being in combat. I have several times done this set-up, gone shopping, on a date, to work and come back to full wep skill and defense.