hello.
for what i read: You using both<large_summon>and <summon> notetag.
When you call a summon as supposed, all allies are vanished, then nothing happens?.
Did you already check the skill notetag?
it should contain something like this :
<summon_Call:15> (will call summon ID 15)
You should also check for the actor you are calling, it should have the summon notetag.