For FtF play when one isn't fond of twisting stacks, a Moved and Fired counter could be handy for larger scenarios. The latter being for when you've fired but kept rate and you've moved onto other shooters. Sticking the Prep Fire/etc counter to the side would work most of the time, but when stacks get close, something you can drop on top would be handy. Another couple handy counters in this context could be "Broken/Malf Below" to remind you there is something to remember in the stack, and maybe "Hasn't Acted" to provide a quick reminder that something in the stack hasn't done anything yet. Those are the 4 items that often trip me up in FtF play in larger scenarios.