Unit Attachments and Replacing the leader

[Bennu]

We had a situation come up on Sunday.

Our troll player had his Kriel Warrior Piper and Kriel Warrior Standard left out of the unit.

Neither of these models are classified as grunts and thus cannot be replaced by the leader of the unit. Given this, we weren't sure how to proceed since the unit cannot be in formation without the leader, how does this work?

Thanks.

[Lunatic Calm]

The unit rules state that in that situation, you simply mark one of the remaining models. That model becomes the Unit Commander, but is not replaced with the Leader model.

[CorporateSellout]

Horkdes MKII core rules pg. 38:
Unit Commander
The unit commander is the focal point of a unit. In most
cases, the unit commander is the Leader of the unit. If a unit
is led by an Officer , the Officer is the unit commander. If
a unit has neither an Officer or a Leader, designate another
model in the unit to be the unit commander. That model
remains the unit commander as long as it is part of the unit.
Choose one to be the unit commander. Although its model is not replaced by a leader, the chosen unit commander performs the functions of a leader.

[Bennu]

Weird. We must have just overlooked it. Cool, thanks for the help!