With a Shimano Ultegra RD6800-GS or 105 RD5800-GS derailleur, the minimum chain length work fine with the 3T Bailout cassette.
I was forced to keep the chain the shortest possible because I have also a front 52-36 compact and the derailleur must be able to compensate for the big difference in number of teeth, 23 rear + 16 front = 39t, which is actually more than what Shimano specifies for those derailleur (max = 37t) but it works.
But I must say that I use the font 36t chainring very seldom, the 9-32 range of the 3T Bailout and the 52t chainring are sufficient for most cases with ETRTO 349 wheels.