I meant that there is too long a gap between the FD and the MD2 IMO at least for tunnels because the FD i donated away faded way more than the river and the Leo. A hair more than a full powered QOLS but i think the fade on those would reverse with added height and pulled power.
I haven't done field testing on many discs this year but i've gained D on mids and currently my Coyote record is 10' shy of my best Leopard toss last year but i'm sure that i can push the Leo farther now. I haven't thrown Leos this year with the added HSS of a River giving me more wind and user error safety margin. Coyote is hellalong for a mid and i should do a shootout with a Stalker because i've thrown the Coyote farther than the Stalker and again i haven't thrown the Staler this year. Without doing a shootout Leo vs Coyote i can't say which would give me the most safety margin now but i've got very different kinds of Leos and so far the Champs have been the most consistent. At your power a Leo could also fill the gap possibly but other than straighter shots than the FD gives there would be overlap. The sanity of carrying a Leo and an FD comes from distance control. If you don't get separation in D between those two there is little reason to carry both and then the Coyote or the more finicky Axis would bridge the distance between the MD2 and the FD better.
FD and Valk overlap probably given the rest of the discs you are trying out. Adding a lighter P PD and breaking it in could replace the need for TBs and one TD should be enough because that too overlaps with the Valk bad and the FD moderately. But it also depends on what kind of TD you have. Flatter gummy TDs are flippy and opaque and champystar TDs vary in between the plastic blends from straightish to almost moderately overstable role. Dropping the TB might seem like a weird idea considering how fast the less than FB stable discs are but the FD can fly the same lines if it fades like mine did and the PD powers down nicely into similar flight. The cool thing about the PD is that it handles winds better than the TB. The cool thing about the Coyote paired up with the PD is that because both are long for their class and great discs they have good distance separation and the Coyote is straighter than the TB and easier to place and manipulate they cover the TB shots and doing it better than the TB does. There is the reason why i don't use TBs and that it fades too much for tunnels even broken in to flip state and even in max weight champ it doesn't take winds as well as PDs and some other more modern disc. TB is the granddaddy now move over Beethoven.


