Thanks Zippy. I'm also on X1X and in personal testing IPv6 significantly helps download speeds, so if it's not negatively impacting any Traffic Priority rulesets or in-game performance then I'll opt to leave it enabled.
For share excess I have enough bandwidth to spare so disabling for download allocation doesn't seem to serve a purpose for me. For upload speeds disabling Share Excess is almost required for me, as I've got so little up speed to dole out.
Here's where I'm at with this experiment:
Platform: X1X
Bandwidth: 350/10
Location: Northeast US
Problem: 4 out of 5 matches on average are shoot-first/die-first experiences, or perceived one-frame death experiences. That one out of five that works gives me hope that there's a solution here. I'm not chasing god lobbies, just trying to balance my communication with the servers and have a chance to react in game.
Geo Filter: enabled - "home in ocean", ping assist: 25ms (this just helps me eliminate p2p connections with low tickrates and high pings, which are seemingly rampant around me)
DMZ/Port Forwarding/Triggering: None
IPv6: Enabled
DNS: Cloudflare 1.1.1.1 (personal testing, this was best for my dl speeds)
Anti-Bufferbloat: 100% set to Never
Bandwidth Allocation: 100 down / 2.5 up (spending a lot of time testing here still)
Share Excess: download: enabled, upload: disabled
DumaOS Classified Games: disabled
Traffic Prioritization: option 1 from OP*, UDP only (i haven't tested a ton here, to be fair, but the "both" option in my initial experience was not as stable as UDP only)
Current Evaluation: mixed bag. I haven't had any miracle matches, where I feel like I'm ahead of the lobby, but i don't feel as behind either. The connection seems more consistent than it was prior. The shoot-first/die-first matches seem less frequent, but are still there. That said, this is already noticeably better than my vanilla settings. The overall "feel" is improved, which is ultimately all I'm trying to solve for.
As I enjoy tinkering, I'll be plugging away and tweaking settings in the coming days as well. Love this community and thanks for the insights and advice everyone!
*Source 3074-3075 -> Destination 3100-3500
Source 3100 - 3500 -> Destination 3074 - 3075
Source 3074-3075 -> Destination 30000-45000
Source 30000-45000 -> Destination 3074-3075