Decorating order

I have a freshly plastered room, with no mouldings yet in place (dado, architraves and skirting all to be glossed, cornice emulsion) which I intend to sand and stain the floors in. Therefore do I:

1. Fit cornice> emulsion walls & cornice > sand & stain floors> fit dado and skirting> gloss

OR

1. Fit cornice> sand & stain floors> emulsion walls & cornice> fit dado and skirting> gloss

OR

1. Fit cornice> Fit dado and skirting> emulsion walls and cornice>

gloss> sand and stain floors

OR

some other combination?

My feeling is 1. to avoid sawdust getting into the emulsion, and be very careful about preparing the surface for gloss - i.e. clean very well. I'd rather sand the floors before fitting the skirting so that I dont ruin the skirting. 2. seems reasonable though if I clean well after sanding??

Any good ideas/experience welcome.

Cheers,

Rich