defense reduction calc order

[Wiz]

Has anyone worked out the order in which -defense mods are applied to arrive at a final defense number? In particular, if you have conviction and Inner Sight in effect, what is the order of application? Now that IS gives a quite substantial subtraction to enemy defense ( ~816 @ level 20 IIRC), it can actually be useful past the first few acts. In particular, if IS or other mods, like the -25% from eth runes, is applied after the %reduction from conviction, it could be very useful indeed -- and it would make Act 1 mercs much more desirable.

Any ideas?