Hi guys,

I've been thinking about trying to mod in some additional summon stuff, specifically stackable summons.  Curious to see how it would play out  Thing is, I can't quite come up with a way to have it balance.  Hoping for some discussion from the clever people here.

The basic thing I'm shooting for is to have 1 *stackable* summon spell for each element.  So lets say for Earth, you get:

Earth 1 - Summon Earth Shrill (10 mana)

Earth 2 - Summon Stone Golem (20 mana)

Earth 3 - Summon Crag Spawn (30 mana)

Earth 4 - Summon Earth Elemental (40 mana)

Earth 5 - Summon something big and nasty (50 mana)

So by stackable I mean you can cast these at the strategic level as many times as you want.  The mana cost shown there is just an example (would probably need to be higher costs, possibly something like 10, 20, 30, 50, 80) but would obviosuly be a higher mana cost depending on the level.

The question here is... what should the mana upkeep be for each of these?

As far as I can tell, all the strategic summons currently have 1 mana upkeep.  That works fine when you can only have one of each summons at a time.  But i'm wondering if it would be way too powerful if the spells are stackable.  For one thing... if they all had a mana upkeep of 1... there would be no reason to cast anything but the most powerful Summons you have.

Maybe make the upkeep cost equal to the level of the spellbook, so 1 to 5 ?   Not sure, that seems kind steep.

What do you think?  Any input appreciated.

Thanks.