Alright, had a chance to do a quick looksie. Default play is doing pretty well, though you're likely missing a few SS resets. It can skewed sometimes in Cinder, so it's not the easiest thing to check, but just be mindful about that.
More importantly, let's actually address the death you took. You died from taking multiple final stings likely entirely unmitigated. I say likely, because you only had spell block up. Shield Block had dropped about 2.5 seconds before the stings started coming in, which is where uh-oh happened, since spell block only makes you able to block spells; it still relies on your block chance to actually block the spells, so you got murdered. hell, it actually looks like you got murdered so hard, you died through BSV. It's very likely you had an SB charge based on what I can see from your cast breakdown, so you likely could have survived had you remembered that. Barring that, you at least could have panicked spell reflect or something for the DR. It almost certainly wouldn't have saved you, but it's better than simply dying with no real defensive available.
Another thing that would have saved you, and is something different to work on than defensive utilization, is popping Shockwave. Final Sting can be delayed by stunning enemies, and you could have stopped all the final stings by shockwaving them, giving you time to get shield block back up if you didn't have a charge/rage or even time for the mobs to just get dropped, either. Interrupting things like this, that can't just be pummeled, is something else you can work on, since you're criminally underutilizing a lot of your stop options. You only used storm bolt 3 times in the entire dungeon, even though you could have stopped the one honey volley that got out, or helped your party take less damage from bee-zooka, or even potentially helping with defensives on the final sting bees by desyncing their casts, giving your healer time to heal you in-between stings. Interrupt game like this is going to be important in pushing higher keys, since casts become very deadly for DPS and Healers very quickly. It's probably one of the things you can do on your end to help ensure consistent clears on keys on your own end.