WOTLK Spell ID or else dont know?

[erebos]

Hey guys im working on the WOTLK db adding item. I've been adding items for a couple of days now my count is 127 but anyways im working with the Deadly Gladiators now and they have this (Increase Attack Power by 86) but i can only find a spell that gives that but is Increase Attack Power by 104 and since is a premade spell 36068 i cant or dont know how to change that value. I found this spell on wowhead but thats the only one i can find to use for that purpose.
how can i do this to specify an specific ammount for Increase Attack power adding it as a spell as the weapon has it.

Thanks.

[Aznex]

Attack Power 86 - Spell - World of Warcraft


spell=15829

[erebos]

Attack Power 86 - Spell - World of Warcraft


spell=15829

Thx Aznex +Rep