Need to grapple/pin as a caster

[Yogibear41]

How would a vampire caster(who needs to drink blood from things while they are still a live) go about grappling and pinning creatures with a horrible bab and still medium sized? I was thinking paralyzation/sleep effects but I'm not exactly sure how grappling a helpless target works? Do you auto succeed on a pin instantly and drain the blood of a sleeping target? Although as soon as you did they would wake up from the spell.

Would be using a homebrew class that is essentially 2-3 hit die of undead and no LA, probably sorcerer levels to go along with it but will be delayed because of pseudo racial hit die. Let say by ECL 5 I am a 2nd level sorcerer.

[Dusk Eclipse]

Polymorph, stacking Size increases, an octupus familiar, etc.

[infomatic]

Getting summoned monsters to grapple for you is a natural trick. The low-level ones have lousy grapple checks, though.

Enlarge Person won't work on you b/c you're undead, but Ray of Enfeeblement's a natural low-level spell that's good to have anyway and will make grapples harder to resist.

Beyond 1st level, Alter Self/Polymorph Chain; Black Tentacles; Claws of Darkness, Earthen Grasp, Summon Chain … make casters best grapplers.

Pick up Gloves of Titan's grip early on.

[Urpriest]

Google the Grapplemancer. It's a low level Wizard that grapples like a champ.

More generally, you should automatically succeed on grapple checks against unconscious or willing opponents. Can't find the relevant rule though...

[Kraklen88]

I think Polymorph, Alter Self (if cheese), Summon Monster, and Hold Person all deserve consideration. Also creative uses of your Dominate Person Stare can really put people in a compromising position.

Lastly, poison. Sap all of their strength.

[infomatic]

Google the Grapplemancer. It's a low level Wizard that grapples like a champ.
...

That is neat, though Aberration Blood, again requires humanoid, and Fearsome Grapple is 2nd level spell so won't have as Undead3/Sorc2.

[Helcack]

Do what vampires always do... Be sexy and flirt with horny people. BJ's are an easy way to get a lot of blood with no struggle. Or charm person/ if you're gross.

[cakellene]

Don't vampires have a dominate ability?

[Yogibear41]

Well its generally pretty easy to grapple level 1 commoners walking around when I have to but, I'm talking about if I ever actually wanted to go adventure or something how to grapple things that actually pose a threat. I really should have named this thread making things helpless so I can snack on them instead of asking for grappling advice. Let me re-phrase I want things to be unable to hurt me when I decide its time to walk up and have a snack. For whatever reason lets says I can't snack on things when they are at negative hit points before dying because well maybe they just die when they reach 0 hp.