What is abusive ?

[Meglobob]

Evilhomer said:5) Using combinations of "mists of deception" + some battle enchantment damageing spell (like wratful skies) and then retreating the caster mage. Basically there is no way to kill the mist, so the enemy army has to endure 50 rounds of mass lightning bolts....pure evil in my opinion.

Is this still a problem under 3.10?

I cast darkness and my mages morale broke, so he legged it, the darkness ended straight away, as soon as he left the battlefield.

So if you retreat the casting mage under 3.10, the battlefield spell ends. Problem solved?