To be fair i do not really rember that well the click system but i do rember that adding the ,,,,,,,, at the end would use it as a fake spell will i find this just setting about on the internet

/castsequence 0,0,0,0,0 makes it, it attemps to use an undefined object in your bag, I mean it doesn't use anything at all, since it doesn't find an object in that undefined slot it jumps over it.

av tested it a bit what i rember with a fire mage and it seems to work ok it add a space so its not casting the same spell over and over with a inscast and no cooldown.

anyway ill leave it for someone that rember the system and see if they can find a way to get it to work.

have fun!!!