Glad to see you that you're playing with Skarlet, seems like you got the execution and combo's down with her.
I'm seeing some nice hitconfirms.
Skarlet general
1. You use F33 a lot, I would use it a lot less because the advantage and cancel advantage is not too good from that String.
2. Use B11F4 not so much as well, it's a good string but you use it when you JIP'ed. You should be going for 114 then, 0 on block and more cancel advantage that allows her to use RD mix-ups. Able to go into EX EDC if they are blocking standing or crouching and go for a whiffed dagger frametrap.
3. You use dagger way too close at certain moments.
4. Don't cancel F4 straight into DS, go into F4 +RD. Allows you to hitconfirm into a slash.
5. I'm seeing teleports while he is lying on the ground. Why?
6. He started D1'ing your cross-overs, a JIK into down dagger would have countered that and given you a free combo into pressure
7. Some combo's got too many hits where you'll end up resetting them too low and you'll have almost no advantage. You can get more damage when resetting them sooner instead of dragging on the combo a bit longer. + You get chip and build meter while they get no meter. Check out some threads in this forum, you'll find the recommended combo's somewhere.
8. You went for a lot of F43 and they hit. You should have gone more for F4 + RD, even if F4 whiffs your 3 will come out.
Jax MU
1. Punish a whiffed dash punch with 212, you'll get a lot more damage + reset into pressure
2. I don't think he ever canceled a GP, should have gone for RD + slide
3. If you don't know this, US whiffs on Jax' D3, sweep and GP(if he's at a certain animation). Just in case you try to do this while Red Dashing
4. Block his F4 and then let go of block, could have punished that OHS real nicely with D1 + RD.
5. U3 and F43 let his GP whiff. Use F43 when you're in range of his DP and he has no meter. Full-screen it doesn't really matter.
I'm liking what I'm seeing, there is just some stuff you need to work on.
Keep it up man, I'd love to see you play with Skarlet in a tourney one day
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Improve this stuff, get some new matches in and show them to us again. Then we can talk pressure.