Howdy Timber.....it's been awhile since the question was asked, and I have seen some of your other posts about your return, so I'll tell ya what I did. Got me a single 60 locked box, a 70 locked box and an 85 locked box......those were what was available. I've since realized the 70 was actually unnecessary. I set up 2 macros, one to pick the lock, one to relock the box. Gains were very easy till about 90 or so, and once I hit 90, I headed to the Weald. GM'ed at the weald.
I use the EC client, I set a macro for last skill, last target for the pick macro, and if I remember correctly, put the key in the first macro slot and then last target for the lock macro. Hit one, then the other. I actually use the Logitech G13 gamepad, so I setup a macro within it, used the pick macro 2 times, then the lock macro. Only real problem is it sometimes causes a delay since you may not have picked the lock. So, if 2 trys to pick and no bueno, then you end up unlocking the box, 2 trys to pick an unlocked box, no bueno, and then locks it. So occasionally a wasted effort.
The WEALD is the way to go my friend, can't emphasize that enough.
Good luck Timber