Legildur said:
I'll get mauled by the ranger if I try to grapple. Although the sorceror does not have a melee weapon. Unfortunately, my character has both hands full, and so grapple isn't really an option for that reason as well.
You are fighting two on one and you are pretty close to the Sorcerer since you just took his Chaos Diamond away.
From your other thread, you have allies who can eventually help.
So, you put the Chaos Diamond away (assuming the DM rules this as a move action, retrieving items is), do not care if it provokes an AoO, this frees up a hand, and then you grapple the spell caster.
Sure, the Ranger / Demon can attack you a lot with his two weapons, but there are no set answers here. Spell casters are typically more threatening than combatant types, at least in the short term. But, there are only a few ways in which to take out a spell caster. Do you really want to repeatedly face a Sorcerer who can cast Flesh to Stone? Or do you want to take hit point damage from a Ranger? Either way, you will probably take a lot of damage from the Ranger, so why not totally incapacitate the Sorcerer in the process?
And, if you are keeping two of the three demons busy, then that allows your fellow PCs to gang up on the third demon. DND is a team activity. Sometimes, you have to take one for the team (something a Paladin should not hesitate to do).
You are (with Chaos Diamond in hand), 13th level with about 90 hit points. You should be able to suck up at least two rounds of damage from the Ranger. That should give your allies time to help.
If you take out the Sorcerer completely with a grapple, you do two things: 1) Change the odds from 3 versus 7 to 2 versus 6 (both your PC and the Sorcerer become non-entities in the fight until the grapple ends), and 2) Your side then has the only spell casters which is huge in DND.
The advantages of a Grapple over a Disarm or Sunder of a spell component pouch are that it takes out both somatic and material components (not just material ones) and it limits the mobility of the opposing caster (shy of teleportation type spells). And if the Sorcerer is casting teleport type spells, he is not casting offensive spells.
But, taking away his spell component pouch is not going to stop a Sorcerer. At least, not any Sorcerer I've seen. Your plan to take away his pouch and then concentrate on the Ranger will result in death just as fast or faster (a save or die spell by the Sorcerer combined with attacks by the Ranger) than grappling the Sorcerer.