Overall good guide. Try adding this:
-PKF also is good recovery if your facing away from the stage and you're launched to a upper corner.
-Here are some Combos and strings:
*At low, low %, Dthrow into nair, jump into nair, into up air or fair can rack up damage from 13% to 38%
*At mid % , dthrow into nair, jump into upair can do 19%
*At Low-mid% depending on the character dthrow into utilt is well for damage, but it will be sourspotted, but still does 14%
*Finnally, at high % Dthrow into double jump upair may kill around 108% on FD dependiing on characters, rage and DI
A little correction: on the chain you showed, you did not specify which throw you should do after the second grab.
The most important thing is that you find a character that suits you!