For me, lectors on foot get the AOMI, but as your list is quite small I dont know if you can squeeze the points. With the rest of the list, if the AL dies the entire army only goes down to Ld8 essentially, keep the BSB with the halberds and then the GS, knights, demi's etc will all still have Ld8. Id say keep the BSB better equipped, he gives hold the line as well as the leadership reroll, and I'd rather reroll a Ld8 roll than have a single Ld9.
Arfa