Based around what I've seen around the web, it seems that a large vocal consensus is that animate dead is the best summoned spell (not counting the Diva and Planetar) in the mages arsenal especially at level 15. I question this though...
From my perspective, this is far from true. I personally believe the best mage summoning spell is MordenKainen's Sword. I've used both spells in many similar situations in the same area and found that MKS, just out shined the 9HD skeleton warrior.
Only thing Skeleton warriors has going for it is the duration and the 90% magic resist, and o watch it still get wrecked by eye tyrants and illithid/mindflyers, and umber hulks. I unleashed 2 MKS, and those two made about half the illithid dungeon their bitch.
While MKS does have the downside of capable of being charmed, which makes no sense, but hey its a floating Sword so who am I to complain? Havig a cleric use chaotic command literally eliminates one of its very few weakeness.
I've also come across almost no character that is immune to MKS damage, it even hurts demi liches, when its not imprisoned.... Yet, I've ran into things that are immune go the skeleton warrior damage. I've even seen MKS hurt things with decent magic resist.
As far as immunities go,what is MKS not immune to? I with the occasional death spell or imprisonment, the things ita immune to just seems to keep grow. I just now learned that it is immune to fire giant. Things that killed Skeleton warrior in a few hits MKS boxes with!
If MKS had the same duration as animate dead, I'd probably never use... OK thata a lie. I would still use animate dead because of its swarming potential alone.
But who thought it was a good idea to not allow summons to transition to the next area?
Forget to add that a pro for skeleton warrior is you can control where it gets summoned.