I am on a fleet which has just changed its policy on what alt we set in the fcu (alt selector) whilst intercepting the g/s from above. We have gone from 1000` aal to above current a/c alt.
How about the minimum altitude (per your policy) for a "stabilized approach" for an ILS? If you haven't intercepted by that altitude, you should go around...
FWIW, I have found that the 744 is very unlikely to intercept the G/S from above in a reasonable manner in any automatic mode. Hand-flying it down is the best way. FLCH or V/S may give useful Flight Director info, though.