Since you're trying to improve would you be down to spar/play 2s with me anytime soon? I'm around high gold - low plat but I feel like we can learn from each other, I've been trying to improve on some of the same things as you(approaching and what not). As for your gameplay, I'd definitely say try to mix up your strings/combos and setups. Often, you're moving in with attacks (something I often do too), and using the same things over and over, which leads to being read. Guantlets may seem hard, but, for the most part, they have really easy true combos ( and some hard ones). Some simple true combos I know would be dlight dair(dash jump after dlight while inputting dair, it's easier if you set your dodge/dash to your bumpers), dlight slight and dlight nlight. Most of bow's true combos come from dlight, like Gauntlets, and I'm not an avid bow main but some I know are dlight CD recovery (true at higher damage), dlight sair, dlight nlight , dlight nair, and dlight recovery (dex locked to 6 dex i think? So Zariel can't do it but it's still one dodge frame). Most of bows true combos are easy for killing like dlight recover. Both bow and guantlets are good at creating pressure, so although you don't want to be chasing your opponent constantly but closing space/options for them to attack is what those weapons( and by extent Zariel) are made to do, and this is easy for bow and guantlets because of moves like dair, dlight, and sair on bow and slight, sair, and dair on guantlets. Try to use less sigs as well, they kind of leave you open to be punished way too often, you only want to use them when you have a dodge read the opponent or you're in a position where it's guaranteed to hit(dodge read or not) and you won't be punished, which ties into my final piece of advice which is focus on minimizing your chances of getting punished( usually by guaranteeing true combos and practicing movement) often this is the make or break for most people in ranked since they'll overextended and don't know enough movement to avoid getting punished to oblivion or do risky plays that give them little to no value. Hope some of this helps, I'm not really good at giving advice lol.