Cutting 5v galvalume

What's the best way to cut panels? Nibblers ? Electric snips??? I usually just use tin snips but job has a lot of cuts and I need to get it done

I cut galvalume half round gutters with a metal cutting saw blade. It goes right through and stays sharp for a long time.

Turbo Shears. If I need a finished edge I will cut it by hand with snips. I prefer 90 degree rights and lefts.