Magus delivering helping spells with a weapon

[Merm7th]

I have a strength based Whip Kensai (Str 18). Say I want to deliver cat's grace or infernal healing to an ally with my whip.

1) Can I voluntarily do no strengthen damage. Get the whip to the target with no force behind it? Furthermore can I actually give myself minus strength penalty to the damage?

2) Can the ally choose to be flat-footed against the attack, not avoiding the Attack?

[Falcar]

As far as I know a player cannot choose to not add his strength to damage. That added damage is always there and no rules allow one to ignore it. That said it would be fine house rule to use as realistically a person can choose to throw a "half hearted" swing not putting ones full force behind it.

The same goes for the second answer. I do not believe the rules allow one to choose to be flat footed. Though your ally could close his yes (granting you total concealment) and lose his dex bonus to AC. That would however have to be done on his turn I assume and would last for the whole round.

[Human Fighter]

An ally can allow you to just hit them with no ac roll.

You can intentionally do nonlethal damage at a -4 penalty, but auto hit won't care.

Whip normally doesn't damage armored targets. Touch them and be happy.

A friend of mine is doing some interesting stuff with an alchemist and syringe spears. Tiny silver spears with healing potions inside them, and he does 1 non-lethal and it's negated by the healing granted.