How many troops form a "large enough" force?

[ano]

I always wanted to know, how many troops you should attack with to make enemy mages use their scripts. If you attack with single scout, they won't cast scripted battlefield enchantments and other spells that require gems, but it may be really useful to send in a "large enough" suicide group of cheap chaff to see what is awaiting you.
Does anyone know what this "large enough" equals to?

[Ironhawk]

I dont think anyone knows the formula. It has to do with how dominions internally calculates the strength of the attacking army compared to your own. Off the top of my head I would say something like at least 30% as strong as the force you are attacking?

[Zeldor]

1% makes it enough too. MY mages burned like 40-50 gems last turn against single warlock.

[vfb]

I had an S3 Shadow Seer sneak into an enemy province to provide Mind Hunt cover for an assassin. The Shadow Seer got discovered, and it caused the full scripts to be used, really quite a lot of gems. He had Returning scripted too, but got killed by an Air Elemental before he could cast it.

[K]

I've seen Golem SCs and Earth elementals from Earth Attack cause gem blowing battles. I don't think the counter has anything to do with GP cost.

[Zeldor]

And I have seen 20 mages totally ignoring script when trying to storm castle with over 10 enemy mages inside. Instead of anything that deals damage they decided to cast body ethereal, luck etc on meatshields, while they were getting poisoned and shot by fort towers.