Diana vs LeBlanc Mid Matchup
Diana Mid wins 52.6% of 1,767 Low Elo games against LeBlanc Mid, +1.0 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 Diana
Respect LeBlanc's ranged pressure early, then use Crescent Strike (Diana Q) to mark her before Lunar Rush (Diana E); keep Pale Cascade (Diana W) for the burst instead of spending it before LeBlanc commits.
Pale Cascade (Diana W) shields Diana while its spheres damage nearby enemies, blunting the short burst LeBlanc tries to deliver with Distortion (LeBlanc W).
Crescent Strike (Diana Q) applies Moonlight and lets Lunar Rush (Diana E) dash again without its normal cooldown, giving Diana a way to keep chasing if LeBlanc spends Distortion (LeBlanc W) early.
How to play as LeBlanc
Bait Pale Cascade (Diana W) before spending the full Distortion (LeBlanc W) burst; if Diana keeps W ready, take a short Q-and-chain trade and save the return to avoid her extended follow-up.
Sources
These notes come from r/LeBlancMains, checked against the champions' abilities.