ATE 200 is good stuff. I like it, you should be fine with one can. But i would get two to be safe, especially if you are turkey basting the master cylinder to remove the old fluid.
I have used all sorts of full synthetic dot4 fluids. OEM, ATG Type 200, Valvoline, Johnsens.
The best/most expensive fluids, have a high temperature "wet" boiling point or approximately 3.7% moisture content (industry standard calculation for 2 years of service life), vs dry which is 0% (new in bottle).
Check out this fluid comparison chart thingy:
https://www.lelandwest.com/brake-flu...ow=1&SF=4&ST=2
fancy baster
https://www.amazon.com/Norpro-Deluxe...ter+automotive
fancy brake bluid
https://www.amazon.com/ATE-706202-Or.../dp/B003VXRPL0
Motul 600
https://www.amazon.com/Motul-8068HL-...ng+brake+fluid
Motul 660
https://www.amazon.com/Motul-847205-...ng+brake+fluid
Castrol SRF
https://www.amazon.com/Castrol-SRF-R...ng+brake+fluid
Johnsens's
https://www.amazon.com/Johnsens-5032...+4+brake+fluid