SynikaL
Smash Lord
In my experience, I think I *might* have seen D. Smash win or Clank with Bair once. Definitely not enough times to convince me to stop using it. I have to count human error for something. No Peach is going to be so finicky with their D. Smash edgeguard as to make sure they hit with the first spin every time -- unless Ganons start doing it frequently enough to force Peach to evolve the matchup (definitely not at this moment).Y Why not just normal wall tech which is invincible for 19 and then up-b her? Does a bit more damage as well.
Up B may do more damage, but Bair has the actual killing power. I'll stick with that until matchup evolution dictates I change it.
Sheik's D. Smash is definitely silly though.
Spider:
You can practice teching by turning items on with Mines only and going to either FD (place mines on the lip) or Corneria (place mines on the fin). I recommend FD, since you can practice way more things after teching.
As for jumping out of Shield, I just practice focusing on making sure I press the Jump button first. That's likely your problem -- you're too hasty in your execution and tend to move the stick first and get rolls, side dodges and such.
I remedy this specifically by practicing Out of Shield techniques using Light Shield. I make sure I'm still Shielding when I press jump. Psychologically, it forces my mind to pay more respect to the Jump button.
I Use the Control Stick to Jump situationally -- situations where I want Up Air to come out as Fast as possible. When certain characters are being aggressive up close is a general example.
-Kye