List looks nice enough, but need to uphold the 1l min-max, and I did not check if it does. Other then that, get a blister of Salamanders too, they can be attached to Skinks (one stand of Sallies to a unit of Skinks), and if you like varaity of painting, opt in for a stegadon as well.
For some reason people make list and group stuff together, calling it "brigades", so just to clear this up: Warmaster has no armylist-composition option called Brigade, actualy the ONLY time a "brigade" comes into play is when YOU as a player, before rolling a command to start moving certain stuff on the battlefield, tell your opponent: "these (2/3/4) units together, I will move with one order.
ANY group of maximum 4 units that are in contact with (at least one of the other elected units) eachother at the start of the Command Phase may be moved with just one roll. The result of that roll is applied to ALL the nominated units and they must end their move in a legal formation, again each unit that moved should at least touch one other unit in the formation (EXCEPTION: "brigade" can brake of units when units end up in contact with the enemy, but "non"-contacting units adhere to the rule above !!)
Subsequent orders MAY be given to the same (brigade) formation, but you may also elect to "peel away" units from the formation and proceed with a "smaller" brigade.
So I hope you understand that there is no nescecity to nominate "brigades" when talking about army composition.