Scenario 1
A moderately high level group entirely made out of 1 Paladin and 3 Clerics decides to send the toughest of them (the paladin) to take on a clan of trolls. Before going too far in the troll lair Cleric A casts shield other on the paladin and cleric B casts shield other on cleric A and cleric C casts shield other on Cleric B.
Paladin(50%) <<Cleric A(25%)<<Cleric B(12.5%)<<Cleric C(6.25%)
In the description of the spell it specifically says hit point damage so whatever damage is take by the paladin half of it gets transfereed to cleric A and half of that hit point damage gets transfered to cleric B and so on.
As well during combat the clerics heal each other to keep themselves from dying especially cleric A who is taking the brunt of the damage even though it is only 25% of the damage.
Scenario 2
All three cleric cast shield other on the paladin directly.
How much damage would the paladin take?
Does anyone think the spell needs some revising?
Aside: In scenario 2 I don't think the deflection bonus would stack
Do the Resistance (untyped) bonuses provided by the shield other stack?