We had one situation in our campaign where I asked my self what the "right" way to solve this is? I am interested to read some of your opinions about this situation.
I am the Imp player and we played with 4 Rebels. It happend that in the end phase of a turn i spend my threat for several deployments. I payed the threat and and placed the cards of the groups open in my playarea (not hidden) and told my Rebels what i bought this round. But i forgot to place the models of one deployment card on the board. The Heroes started their turn, decided that they want to ignore all the enemys (cause it was too much to kill) and charged through to the Terminal which was the objective which the Rebels had to activate. So in their first activation their jumped over all enemys and enabled the terminal. Then it was my turn and i decided to activate the group which models I forgot to place on the board. I realised my mistake and wanted to place them on the board when my Rebels protested against that.
The models I forgot would not have influenced the heroes turn in a direct way, they would not have blocked their movement or their line of sight or their decision to ignore all enemys to focus just on the objective. The position i wanted to place them didnt changed at all after the Rebel turn, i had no advantage about forgeting to place the models in any way.
They said i get the threat back which i payed for the models and thats it cause it was my mistake (well it was my mistake). After some debating I accepted this but was angry that this kind of mistakes got judged this hard (was it hard?). The rebels where of course happy that there was one group less on the board and I had 8 unspend thread instead of 1 unspend.
How do you handle such things in your groups?