Game Mechanics: AoE spells should only hit limited targets until September 1999 patch era

[Dolalin]

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September 13, 1999
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Bug Fixes:

...

- A bug in some of the AoE code has been fixed. AoE spells will now
effect more monsters.

Seems to me as if AOE spells were bugged until this patch era, and e.g. bard swarm kiting should not be possible at Green release.

If I had to pick a number out of the air I'd cap it at four (on the basis of quad kiting spells).