Treasure Hunter Effect Amongst Jobs

[Arcon]

Thief's Knife: +1 THF
Assassin's Armlet's +2: +2 TH
Raider's Poulaines +2: +1 TH
I own all of these and Proc TH8, No offense... It's 4

Why would I be offended?

When TH "procs", as people call it, it only "upgrades" (would be the correct term). Meaning, if it procs TH8, you already had TH7 on before that. TH itself doesn't need to proc at all, as soon as you perform an offensive action on a mob, you apply your current level of TH on it (unless there's already a higher level of TH present on the mob).