On brisket, I usually inject with a little low sodium beef broth and some of my favorite rub. For the rub I just use kosher salt and coarse grind black pepper.
Competition brisket is a whole 'nother ballgame!!
Stealthy Fast Black Thermapen
"You have never lived until you have almost died". "For those who fight for it, life has a flavor the protected will never know".-Unknown Vietnam Soldier