When there is only one TG left in the unit, does the Slann have to enter the front rank? I know kroxigors must do so in skink units, but I was wondering if the Slann could keep hiding if, sotek forbid, there is only one temple guard left.
Back rank can never be bigger then front. So the slann moves up. Explained in same place as kroxigor/skinks in LM army book.
On top of that this is clearly stated in the rules for ranked units in the BRB. I can't quote you the page but the incomplete rank is always in the back. A slann in a unit of 1 temple guard model must be placed next to him. The mixed units of Kroxigors / Skinks is like a unit of TG w/ a Slann.
Do remember that his large target LoS counts when he is in a TG unit, and technically 1 model left is still a unit so you still have LoS as a large target while that one lone TG is standing next to you. For some reason known only to the gods, once that guy perishes the palanquin is grounded.
True, though if this unit was in CC the slann would then technically be "in combat" so he couldn't really utilise the LOS advantages. Another thought along similar lines, I believe you aren't allowed to do anything that would adjust your frontage in combat, (add/ subtract ranks) so if for whatever reason you we're 2 models wide going into combat (TG conga? useless I know but for the sake of the point) and you were down to 1 TG and the Slann would you move him forward as this would change your frontage form 2 models wide to technically 3.....?