I had a Towed Vulcan platoon (late 70s) that had three "Acting Jack" squad leaders (Spec 4's). My other SL was an E-5. We were the only platoon in the battery to pass our ARTEP (Tac Eval).
The day before it started, I got them together and told them why, to a man, they were better than the other platoons. By then, I'd been through multiple evaluations as a Platoon Leader, and knew what the evaluators focused on. Piece of cake...