Your explanation does not make pickpocket a rogue skill.
Charm is not "in fact" (lol at your facts) worse than a summon, because if you remove "temporarily" an ennemy and/or turns its powers against their groups, it also means the ennemy group can turn its damage on their charmed friend, which is free damage that makes the fight end in fewer turns. Weird it escapes you, since you're so big on that.
You can use any melee as meat shield. With 3 mages there's no difference whether the meat shield is a warrior or not. You could even use a mage as meat shield. If you ever played with a mage in your party you'd know that.
Target damage per AP cost is better for rogues than mage, depends on the situation, level and gear, and whether or not you have glass cannon (if you run out of good spell to cast and still have action points to use). Physical attacks scale with weapon level aswell.
There's no field I don't want my melee to step on, if you ever played with a mage in your party you'd know that.
Even if rangers sometimes use special arrows, auto attacks remain useful so they end up with more PER than rogues do anyway. "Cloak and Dagger" and "Tactical Retreat" are still largelly irrelevant, because most of the time I can cover the distance just by walking and it will cost less AP to do so. I use those skills out of combat more than within.
I will not lose my time crunching numbers with someone who didn't do the first step. You aren't discussing mechanics, as Thorsten pointed to, you're just spouting baseless gibberish.