The question of where a leader should be in a stack will vary greatly depending up on the situation. This is especially true when there are combinations of broken, concealed, cx, different levels, pinned, prep fired or first fire counters etc. in a given stack. My leaders will regularly change position in a stack depending upon LOS, the various units' status or upon the sequence in which I intend to fire/move them if I am attacking. I'll tell you right now that my broken unit(s) WILL be on top of the stack by the end of the CC Phase so I will remember to rally them.
You can place your leaders anywhere you want in your stack if you are playing me. I do not need to see every leader, HMG, FT or other high value target to succeed against you. I've been playing SL/ASL for 41 years and where your leaders are in a stack in no way vexes me, delays my play, confuses or inconveniences me. I have no whacky OCD or control issues that compel me to dictate or pressure you to stack your leaders according to my will or idea of where they should be. If I need to know what's in a stack over which I have right of inspection, I will not touch them and cause a REAL game slowing "stack-valanche". I'll just ask you what's in there and our game will proceed without any delay. In short, I'm not a "Stack Nazi". Stack'em where you want to boys!