http://www.uesp.net/wiki/Oblivion:Useful_Enchantments says that effects in an enchanted weapon are applied in reverse order ...
Let's say I have a sword with the following enchantments whose displayed order is:
Weakness to Magic - 25% for 3 sec
Weakness to Fire - 25% for 3 sec
Weakness to Shock - 25% for 3 sec
Fire Damage - 8 pts for 3 sec
Shock Damage - 8 pts for 3 sec
Damage Health - 3 pts for 11 sec
Soul Trap - 3 sec
Do ALL these effects occur at the same instant my weapon hits the opponent, or does something else happens?
And is there really a "reverse order" of effects kicking in?
....
Based in my own testing and experience, I believe the wiki is incorrect in saying the effects are applied in reverse order. That the effects are applied in order is also consistent with other parts of the wiki.
But it is correct in saying that the Weakness should be applied last. This is because an effect on the second strike will replace that on the first. Let's use a simpler example than the one above to explain:
Weakness to Magic 100%
Weakness to Fire 100%
Fire 100 points
if that is the enchantment then on the first strike none of the weaknesses apply, because no weaknesses from a single strike apply to that strike, ever. On the second strike however, the effects are applied in order. So what happens is that since there is a weakness to magic from the first strike at the time of the second strike, the Weakness to Magic is increased to 200% and then replaces the Weakness to magic from the first strike. However, since weaknesses from a given strike do not apply to damage from that strike, then the weakness to fire and fire damage is not amplified. So after weakness to magic on the second strike, the weakness to fire from the second strike replaces that from the first, and finally 100 points of fire damage is applied.
So at the end of the second strike you get Weakness to Magic 200%, Weakness to Fire 100% and Fire Damage 100 points from the second strike.
However let's look at this order:
Fire 100 points
Weakness to Fire 100%
Weakness to Magic 100%
In that case on the second strike the (1) the 100 points fire damage is applied with both the Weakness to Magic and the Weakness to Fire from the first strike are in affect. So the fire damage is increased to 200 by weakness to magic and then to 400 by weakness to fire. (2) Then the weakness to fire is increased by the weakness to magic from the first strike to 200% and then replaces the weakness to fire from the first strike, and (3) then the weakness to magic is increased by the weakness to magic on the first strike to 200% then replaces it.
So at the end of the second strike you now get 400 points fire damage from the second strike, 200% Weakness to Fire, and 200% Weakness to Magic
So much better with the second order. But the above implies that the effects are applied in order, not in reverse order.