Yeah I was late and I mis-read the forumula you were using, so my apologies there. I still have a question about the coefficient you are using. Based on Chippy's post you are trying to simulate a trinkets effectiveness based on the use/proc lining up with your cd's. For on use trinkets this easily accomplished, but you use the same coefficient for proc trinkets as well. HoR for example has a 90 second icd which means that you can get most of the proc to happen under your initial cd's, but this scenario won't happen again until the 6 minute mark of the fight, after that it won't happen until the 12 minute mark.
Same thing could be said for any proc trinket. If the icd means that its not going to proc around 2,4,6, etc... minute mark of a fight then it really shouldn't be calculated as though its going to line up with your cd's. What I got out of Chippy's post is that on-use trinkets were being undervalued because their effect was giving less of a static str bonus compared to similar ilvl trinkets. Thus the coefficient should be use to more accurately model those trinkets since the str bonus will always line up with your cd's, making it more valuable. You are applying it to all trinkets, even those that don't have an on use effect, and who's icd's mean that its never/rarely going to line up with cd's.