It's nice that you're doing decently, but encouraging people to use sub-optimal glyphs is still not going to help when trying to get people to take you seriously. The LT glyph isn't worth 80 DPS. It's worth more than double that even with LT being used around 30 seconds on average and even if every tap requires you to stop DPS. You get 90%+ uptime on the glyph without any interruption to DPS time on Festergut due to frequency of movement unless your guild has you in melee. The assertion that it takes perfect use for LT to beat Immolate is silly. LT is 60-70% better than Immolate so even if you're letting it drop you'll have better results.
The main reason people see these DPS gaps with logs and wonder why they haven't been able to make up that gap when they're doing every very well is that RNG still governs the majority of what happens in game. It's not just crit chance, but damage ranges as well. Most of my best DPS postings have been because I happened to crit 4-5% higher than I should on average, or my nukes hit above the curve. It does feel nice to outperform simcraft's average DPS, but you're just as likely to come in under it and after sweating over a parse for hours not understand what you did wrong. Fact is, you might not have done anything wrong. RNG said no, so the answer was no. There are a lot of things that can happen that if lined up perfectly in the RNG will result in lots of fractions of DPS that can pile up over the course of a fight. Look at the DPS distribution in simcraft sometime to see how it works out. The reason Afflic seems so much better than Destro right now is that while yes, it does work out higher on average and it's theoretical maximum DPS is higher, the DPS range is also slimmer.