A couple of things, fat up or down, I use both and feel you should point the fat cap in direction of the hotter air to protect the meat.
fast cook 350-400 vrs slow 225 250 the faster cook you will see more shrinkage, a different texture to the meat, not so pronounce smoke ring, maybe a better flavor..
Cooking above the water pan on a Backwoods, I feel not to do this, your meat will have a poached looked to it as the meat is being steamed...
wrap or not to wrap, if you decide to wrap wait untill 165 / 170 internal
Temp to finnish, I have seen mine plateau for a short time and a long time, depends how tight the grain of the meat is..I will pull at 185 IF the probe goes in real nice, never have i gone past 195 and still able to get slices, after 195 it might crumble..
resting, I let rest up to 4 hours, wraped in blanket, never sealed as the bark will soften..
take alook at your rubs, add some turbinado or brown sugar on top of your rub to help seal it..I have wraped in foil, not wraped... cooked fast..cooked slow..fat up fat down...water tray..no water..every way posible to cook a brisket..injected..not injected..mustard bath...beef broth...a salt bath the night before...you name and I have tested it and 99% of the time it is just running of juice when it is sliced...
So take a look at how much air is running tru you cooker maybe a key there..but look at your final rubs..and seal juices in...ps, my best brisket was wet aged 4 to 6 weeks...