Yep with brisket I'm a fan of just salt and pepper.
It doesn't need anything else. Let the meat flavor shine through.
KISS.
it's a big piece of meat that ranges from about 1 inch thick or less at one end, to 5 or 6 inches at the other. By the time you get the point done , which is heavy in fat, the flat will be overdone . This is why many will put their point back on and make burn ends out of it.... It's not rendered enough when the flat is done. Particularly on a prime in my experience.
Dont sweat it, when you've got the bark you want then wrap it you won't make any bark after you wrap. If you wrap it too soon you won't have any bark. I start checking about 165 and wrap it somewhere between 165 and 175 with paper , and I cook it at about 265-275. No particular reason. Generally I can count on cooking it till 202-203 and it's good. That all depends on where your thermometer is.... Thin end of the poi7nt can be 210 and dry by the time the middle of the point end gets to 200. It's a balancing act, and you can always cook the point more.
the best advice I can give you, is that it's hard to tell the state of your bark via a flashlight at night time. It may look like you don't have it like it's brown under the flashlight and it's really very black. Higher temperatures create bark at lower internal temperatures. This is why I use about 265. If you use 300 you'd have bark much earlier, and if you used 225 you'd have bark possibly later. When in doubt I'm wrapping about 170. With ribs as well I feel I don't get much good bark at 250.