Irelia vs Mel Mid Matchup
Irelia Mid wins 56.6% of 982 Low Elo games against Mel Mid, +1.9 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 Irelia
Let Mel push the wave toward your side and keep low-health minions available for Q resets; use a minion dash to dodge Solar Snare(E) before turning back onto her.
Only look for an all-in from healthy HP after Mel misses E. If Rebuttal(W) stops your stun, wait for W to end before committing your ultimate and autos.
Irelia's Bladesurge(Q) can reset on a kill or a marked target, giving her a minion to dash through and change direction around Solar Snare(E).
How to play as Mel
Hold Solar Snare(E) for Irelia's approach when she has minions available to dash through; if she baits Rebuttal(W) with her stun, back off until W is available again.
Sources
These notes come from r/IreliaMains, checked against the champions' abilities.