Advice & opinions please. When you get close to your artifact limit, is it better to collect them one at a tiome, or use the 'All' option ? Which one gets you more of the 'must have' items, rather than just a load of dross .....

I don't think it matters. What you don't want to do is collect the artifact points as you get them because you never get anything that is more than your hourly earning. Once your points are full, Selecting all at once is equivalent to sitting there and clicking the receive button over and over.

well, after having to collect my artifacts one at a time for over a year, i'm making up for lost time hitting the 'all' button.
but it dosnt matter, unless you want a specific artifact, ie a mass storage pod, then collect 1 at a time until just below 20000

you dont get anything good below 3k so if you dont mind "wasting" 2-3k art each time you pull do one time pull...unless you are for some specific low cost arti like the probes than it doesnt matter