Shield Game and Kill Tactics at high %

[Glide]

Well, the title should be fairly self explanatory; At low percentages, my Marth is fairly decent -- But at those higher percentages, I fail to land my kill shots with surprising regularity, and my shield game deteriorates to nothing since I'm so incredibly used to Shield Grabbing. I've heard of sh out of shield into an aerial, but I've had little success; any advice?

[Rune]

You're talking about when your opponent is at high % right?

If so, try out your forward B and neutral A (ground).

Neutral A gives a nice setup for Fsmashes and Fairs against light opponents, same goes for a single forward B.

When up against a fastfaller, try the second attack in the forward be combo (use the forward one, not the up attack).
It'll hit them just about above your head, perfect for Fsmashing.

Another idea is to screw combo's and go for a combo finishing move streight ahead. Be carefull though, these moves have lag, so if you miss they'll punish you.
Nair, Bair, Uair, Utilt, Ftilt, Fsmash, Dsmash all do fine in this case.

[ArC_man]

well, on the shield game part, just get used to not pressing A everytime someone attacks your shield (i kno i got really used to it and i had a difficult time learning to do attacks from the shield more). Remember you can also sh out w/ the c-stick.. so yea put ur finger over the c-stick when your shielding.. that'll prevent you from pressing A :p

[EXE]

If you know how to and when to do it, UpB may be good to kill at high %. Not many people use it, and if you hit those against, late's say, DK at 140% at the middle of Final Destination in a way that the opponent flies forward, DK is dead without a chance of recovering. Not sure abouth other chars, and this may be too hard to pull off against fast ones.