Another silly atempt for getting one of those high ab builds.

classes:21ranger/15paladin/4rogue.
race: elf
starting stats: 10str/19dex/10con(4)/14wis/13int/8cha

level progress:
*1-20 ranger: feats: weapon focus(rapier),improved critical(rapier),knockdown, improved knockdown,weapon finesse, blind fight,((skill focus discipline or improved initiative, I went for ii though))

*21: ranger:feat (bane of enemies)

*22-26: paladin: feat( on lvl24): armor skin

*27-30: rogue:feat epic weapon focus(rapier) max out tumble here(which would be 30)

*31-36 paladin: feats(on 32 and 36) epic prowess and great dexternity1.

*37 rogue: max out tumble and other skills you want.

*38-40:paladin: epic skill focus(discipline)
_ ____ _ ____ _ ____ _ ____ _ ____ _ ____ _ ____

note: I just wrote down the feats I took, but they can be taken in any order you want if possible.

fully buffed with paladin spells(divine favour/GMW/bless/aid/prayer) this guy has a decent ab of 61 without counting favoured enemies or bane.So that would normally be 61 + 7(on favoured enemies)=68ab.If you max your charisma you can add +5 to that in a smite making the smite ab 73 vs favoured enemies.
with +6 items and haste I ended up with 61ab(68 vs fav. enemies) and 74 ac.

Forgive me for not showing all the details but I made this build a week ago and don't know everything correctly anymore.But I think I mentioned the important stuff.

Enjoy.