1) Shadowdancer bluffs an opponent with reach, succeeds at the bluff and tumbles through the space occupied by the creature avoiding AoOs, stopping just on the other side to hide in the creature's shadow.
The shadow dancer does not need to make a bluff check.
The bluff check is to make a distraction so that you count as unobserved, but because a shadowdancer can hide while observed this is not a necessary tactic for a shadowdancer.
Tumble check to avoide the AOO, and then a hide check (no penalty)
2) A hiding shadowdancer comes out of hiding to make a full attack and then attempts to hide once that is done.
The shadow dancer is "hiding while attack" You dont actually come out of hiding, you attempt to remain hidden while attack.
-20 penalty to hide check
3) Shadowdancer tumbles into the threatened area of a creature, hides while doing the tumble and then gives a fallen companion some form of healing potion while hidden thereby avoiding the AoO.
Hmm
Not strictly covered by the rules but, a simple action while hidden is normally -5 to your hide roll. You would have to rule 0 this but I would apply a -5 penalty for "hiding while handing a potion"
You still provoke an AOO while hiden/ivnvis by the RAW.
Again you may chose to Rule 0 that you cannot AOO someone you are unaware of, but the RAW state you still get the AOO.
Majere
The shadow dancer does not need to make a bluff check.
The bluff check is to make a distraction so that you count as unobserved, but because a shadowdancer can hide while observed this is not a necessary tactic for a shadowdancer.
Tumble check to avoide the AOO, and then a hide check (no penalty)
2) A hiding shadowdancer comes out of hiding to make a full attack and then attempts to hide once that is done.
The shadow dancer is "hiding while attack" You dont actually come out of hiding, you attempt to remain hidden while attack.
-20 penalty to hide check
3) Shadowdancer tumbles into the threatened area of a creature, hides while doing the tumble and then gives a fallen companion some form of healing potion while hidden thereby avoiding the AoO.
Hmm
Not strictly covered by the rules but, a simple action while hidden is normally -5 to your hide roll. You would have to rule 0 this but I would apply a -5 penalty for "hiding while handing a potion"
You still provoke an AOO while hiden/ivnvis by the RAW.
Again you may chose to Rule 0 that you cannot AOO someone you are unaware of, but the RAW state you still get the AOO.
Majere