Stupid AS question. (in General)

I just noticed that AS cast in combat is cumulative.

Enchanter 1 cast Ablative Shield on all friendly Minions (2245)
Enchanter 2 cast Ablative Shield on all friendly Minions (4490)

... they both have equal level, so that second number is the TOTAL AS I'm
adding. I wouldn't have noticed but my HP seems way off.

Is it like that for any/all spells?

Yes, all enchantments stack, and the last minion to cast will show the total effect. The stacking is based on spell level, though, not effect.

And there are penalties for multiple minions casting the same spell too, especially for AS

*only for AS

No, it also affects GS, and I believe Haste as well. AS just has the harshest.

Bubo: nope. I just tested it, and both Haste and GS don't have the multi-minion penalty AS has.

Also remember that spell *levels* stack, not spell *effects*

Wait, there's a multi-minion penalty on CASTING as well as minions in a team? I knew there was an AS penalty for having 5 minions, but I didn't know that there was one for having 4 minions casting AS.

When you say levels stack and not effects, I'm not really seeing that. Or at least, the change is trivial.

Ablative Shield: 4,657/6,157 (2,245)
Ablative Shield: 4,678/6,185 (2,255)
Enchanter 1 cast Ablative Shield on all friendly Minions (2245)
Enchanter 2 cast Ablative Shield on all friendly Minions (4490)

... 10 HP difference.

... so a .2% change. That's point two. Does the curve get much harsher at higher levels?

The penalty is for AS being cast on more than two minions. There is no additional penalty for multiple minions casting AS.

The penalty is for having more than two minions. All minions casting AS are penalised, but there is no penalty for more than one minion casting.

The level stacking will become more apparent at higher levels. Think of it as if you'd put all of the exp across all minions into a single AS.