Before you even think about using Ness Missile you should try recovering without it(using your DJC).
Uair - Drops you fast, lasts a bit longer than you think and may have you miss the ledge, mainly used for tricking/fast recovering
Fair - Provides some front protection(wont beat out 95% of enemy attacks), somewhat stable, may miss ledge
Nair - Lasts a bit long, Clashes with more attacks more than Fair, not very reliable
Bair - You either grab the ledge after or drop like a rock, not reliable and try not to kill your forward momentum
Dair - Most stable, very quick ledge grab, very reliable
Fire - Drops you very fast, last long, very unreliable
Magnet - Drops you down and forward, kills forward momentum quickly, grabs the ledge instantly, you either grab it or you die
Thunder - Has some nice Forward momentum after 2nd jump, Sperm ball can be used as an attack while grabbing ledge(make sure the ball comes out before you are next to the ledge, use the forward momentum from your 2nd jump to take you to the ledge while the ball comes out), You stay in place for a while then grab ledge