toasty
Smash Hero
These.Wow son, WD oos is probably one of the most basic things you can learn and REALLY makes dealing with certain characters a whole lot easier. As for Ness's CC game, I opt for CC grab (lol on that tho), dtilt and fsmash, tho none of them are really that good and are all situational/rely on bad spacing. Yeah Ness is pretty terrible.
As for the Jiggs matchup, good luck getting the lead and retaining it the whole match. For every bair she does, you need at least 2 or 3 Fairs to make up the difference. She also has a way easier time comboing, edgeguarding, KOing and recovering. Let's not forget how terrible Ness's recovery is. That matchup is probably one of the worst in the game.
and WOWWWWW Sage you gotta be ****ing KIDDING me...you can't WD oos? The way I learned it before I knew much about the game was by holding one of the shield buttons down while wavedashing using the other shield button. That should get you started