Help building incorporating aoo into build.

[ccflier]

I have 20 charisma 20 Dex and 12 Str 7 wis 12 int and no con score(bone creature). Free human feat weapon finesse. I'm a gish focused on flanking, taking levels on dread necromancer, marshal, crusader, and abjurant champion. At level 20 i would only be 2 levels behind full caster level and full BAB. Eventually I will be raising the dead to have even more flankers.
1-M/2-DN/5-AC/12-C

I need some feats to take advantage of my higher dex, so first thing I'm thinking is combat reflexes. If there is an aoo and I am flanking I add my Cha and half my crusader level to damage, so it makes up for my low Str score.

I also have tons of options to use my standard action and swift action for, so using up to +4 attacks of opportunity would help me squeeze more out of my action economy.

Besides combat reflexes, what feats could I be picking up to kinda force my enemies into letting me make AOOs.

I don't have any undead to bull rush them into me, and nobody in my party is building a bull rush specialist, so what option do I have without feats to start making a lot of AOO at low levels?

[Biffoniacus_Furiou]

Robilar's Gambit or Karmic Strike gives you an AoO every time an opponent attacks you.

Even though your BAB and thus caster level are 18, you only have Dread Necromancer 7 spellcasting for determining your highest level spells and spells/day, so I wouldn't exactly call that a gish.

[ccflier]

Even though your BAB and thus caster level are 18, you only have Dread Necromancer 7 spellcasting for determining your highest level spells and spells/day, so I wouldn't exactly call that a gish.

Yes I'm trying to work on that part a little. If I bounce between crusader and jade phoenix mage I can squeeze a few more actual casting in while picking up the main white raven manuevers.
Could go full Jade Phoenix Mage instead of crusader, use feats for the 2 maneuver I really need. A Spellsword ken help too. Just scared of losing too many initiator levels or BAB

Karmic strike looks perfect. Are there any options at lower levels to take?

[Gruftzwerg]

Yes I'm trying to work on that part a little. If I bounce between crusader and jade phoenix mage I can squeeze a few more actual casting in while picking up the main white raven manuevers.
Could go full Jade Phoenix Mage instead of crusader, use feats for the 2 maneuver I really need. A Spellsword ken help too. Just scared of losing too many initiator levels or BAB

Karmic strike looks perfect. Are there any options at lower levels to take?

some manuevers/stances from tome of battle can help you getting some extra AoO too IIRC.

e.g. Defensive Rebuke: all enemies you hit this round must either attack you or cause AoO from you if they attack someone else. Together with Karmic Strike or R. Gambit, enemies will cause AoO's either way, if they attack you or your allies.

combine with the "Iron Guard's Glare" stance which gives enemies -4 to attack your nearby allies. This gives them even more reason to hate you.