Talking about once you are saddled, or making a slashing pass on them... not talking flippy mcflippy flop, but people with genuine SA and timing when avoiding the shot or giving you the smallest target possible.
Who is the hardest person to apply bullets to?
For me, it's been Ink/JETSOM... whether it's been a fast or slow fight, getting a gun solution on him has been markedly more difficult than anyone else I have come up against.