What's your planned filter for the synthesis league start?
I'm personally using NeverSink's. Has worked during betrayal, and it should be adaptive while you level. What I miss though is "Diablo 2 drop sounds effects" that some filters have, that'd be cool!

You reccomend against neversink's in league start, or have a similar with d2 sound effects? lmk.
Either way, tell me what you're using and why you prefer it! is it your go to filters that works for league starts, or do you use different filters for starting league and mapping?

I always adjust a neversink filter on filterblade to my own taste.

By adjusting you mean colors, simply shifting from soft/less strict to strict, or editing it manually?
Cool either way

I use neversink's filter as a base and make modifications to some of the rules.

Neversink with some adjustments in colors and sound (adding)
Edit it manually but you can use FilterBlade to do it for you and download the edited filter.
You can save youre filters on FilterBlade and the next item new filters comes out you can add the missing filters to youre already made custom filter.