Not a blinking clue whether this would work, but, we've got a master to tell me, and you, whether it would work for you to use it.

Read carefully, you too Blue.

First of all have the 'Summons', as actual characters. You'd have to either: a) create your own chara- and battleset for them, or use existing ones, or b) ask Aurvian what he can do. Throughout the game, you will need to get these 'Summons' and add them to the party. Which is pretty obvious. I don't know which program you're using, so I'm gonna try instructions with RPG2K3.

Go into the database, then battle layout. To the far top right of the screen you will see the battle options. To the far left, the characters. Select your Summoner, and turn your attention to the far-right of the screen. Click the SET button, go to Array, a the bottom of the new screen and make it so that the array is one more than it is already. Call this new array Summon. Under archetype to the right, choose LINK TO EVENT. Now go to the COMMON EVENT part of the database. Make the common event so that it gets rid of the current party members not needed, and has the summon. Then go to the M. GROUPS screen. The bottom middle of the screen should be a little event menu. Click the ... next to the trigger part. Right at the bottom should be two Hero sections. Chose the bottom one. Chose the summoner and the summon command. OK that. Then in the event menu, chose Call Common Event. You will need to do this with every monster group etc.

When I have the time I will post the pictures showing how to do this. Or if someone else is willing to, then please do.

In theory, in think this should work, But in practice it may not.

If it doesn't, then you'll have to try something else.

Have fun.