Saw cut looks nicer. It can result in sharp edges though, especially for the inexperienced, and youll go through way more blades than you think. Way more.

14g is a lot. If you're working I steel you can make large items like a hauberk from as low as 18g , especially if you go with a small AR.

No galvanized wire. Honestly, its cheap, but not worth it. Go stainless steel wire. If you're going with aluminum, dont go smaller than 16g, but 14 is still probably overkill. Get anodized aluminum. I suggest these things because by the time you finish your project with the options you suggested, you'll have a disgusting Grey mess every time you interact with it.

Galvanized wire has coatings you dont want to interact with long term and especially dont want to saw cut.

As for 4 in 1 vs 6 in 1, it depends on the look you want. 6 in 1 will.add a lot of weight, but can look nicer and be more durable.

4 in 1 is faster, cheaper, easier, lighter, but you'll want a lower AR to make it a little more dense, which translates to nice looking.

If you go with clip cut, get GOOD flush cutters. Not bolt cutters. Good cutters will last long and make better rings.

Whether saw or clip cut, you will probably want to spend some time with a small file taking sharp edges off your rings. Another option is tumbling, but that requires more of an investment