My most used files are a 2 and 4 cut half round (full size) and a couple of 2 and 4 cut half round needle files. I know I should use a flat file more, but I reach for the half round without even thinking - it just feels nicer in the hand somehow!

For wire ends, you might want to get a cup burr (you don't need a flexshaft, you can just pop it in a pin vice) Burr:busch 411 Cup 1.2mm - Cooksongold.com

As a very simple rule of thumb, you need two gauge sizes higher than the wire you're rounding, so the one above is perfect for 0.8mm wire. It only takes a couple of twists (always in the same direction) and the wires are perfectly rounded. It really is much quicker than using a file, especially if you're doing a few at a time.