Amount of lasers depends on so many things, such as characters and opponent(s) (which includes shielding habits and rolling habits, etc, jab after shield [ganon trick watch out]), and stages (FD ftw lol).
Dair is not always safe. I think Shiek can beat it with Ftilt. Marth can outspace it, etc, but if you mean on shield only, then yeah but you have to make sure you shien afterwards. Playing higher level opponents though, it may be better not to shine and just grab or even attack since opponents at that level will expect the shine and WD back out of it or possibly attack.
Falco dittos only teach laser sillyness and funky combos lol, but yeah I love them so we should definately do that. I'll help you get experience vs most other top tiers too if you want.
Throws with Falco really aren't that good honestly. Fthrow and Bthrow mostly serve as position advancers. Push your opponent towards the edge and all that. Uthrow is great for combos (at least on fastfallers), and it can go into Dair on characters like Marth and Jiggz sometimes (reallllly helpful). Dthrow is a great mixup and allows for tech chase shenanigans. In addition to that, Dthrow on Fox at high percents guarantees a Dsmash (great killer), and at low percents on several characters can get a shine if your opponent isn't DI'ing properly.
If you want more precise follow-ups, I'll try to go more in-depth, but there are lots of variables to account for then. You gotta kinda see what works best on most people and try new things.