You could always use several different scoring categories and take an aggregate of them. You can go by just whichever tier the highest thing you have is in, how many tiers you've completed a certain percentage of, how many tiers you've maxed out, or taking an average of the tiers you register on if you skip a tier. I don't use maxed out completion because I wouldn't even make it past Initiate that way due to not having bothered to watch Soylo or Jyn Erso's Pro Plagiarist 2k16.
My preferred method of scoring these is that whichever tier you can build to consecutively is where you are. So if you have everything up to Knight tier, skip everything on Master and then have the Dark Empire sourcebook, you're a Knight. This method would put me at Grand Master because of the Dark Empire endnotes. Somebody on the old board made another version of this that had the Dark Empire endnotes and sourcebook at Celestial level, but they got moved in this version. I have several suggestions for things that should be on the chart but aren't, such as Rebellion and Force Commander at Master tier and Republic Commando at Padawan tier (how the kark did you leave out Republic Commando?). Maybe that's good for getting bumped up a tier. Do that and put the Dark Empire endnotes back and I finally have enough power to beat up those trolling bedlam spirits and go back in time and fix the timeline so Jar Jar Abrams never fucks up the franchise, among other things.