Naafiri vs Xin Zhao Jungle Matchup
Naafiri Jungle wins 48.3% of 602 Low Elo games against Xin Zhao Jungle, -0.5 points vs expected, 2-patch window 26.19-26.20.
Researched on LoL patch 26.20. Tips are written to hold at any rank; stats come from Low Elo ranked games up to patch 26.20.
How to play as Naafiri
If Xin Zhao activates Crescent Guard(R), check whether you are his challenged target; if not, stay outside the ring and wait for it to end before committing your damage.
Break off an extended melee trade before Xin Zhao's third Three Talon Strike(Q) lands; the third attack knocks you up, giving him room to continue the combo.
Crescent Guard(R) knocks away enemies who are not challenged and makes Xin Zhao impervious to damage from champions outside its circle, which can interrupt Naafiri's ranged engage if she is not his challenged target.
Sources
These notes come from r/NaafiriMains, checked against the champions' abilities.