Darius vs Illaoi Top Matchup
Darius Top wins 46.5% of 3,082 Low Elo games against Illaoi Top, -0.7 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 Darius
Keep a minion between you and Illaoi to block Test of Spirit(E) when you contest her, and clear nearby tentacles when you have a safe opening.
Disengage when Illaoi casts Leap of Faith(R); resume the fight after its tentacle burst window ends instead of trying to out-duel her inside it.
Test of Spirit(E) can pull Darius's spirit out of his body, and nearby tentacles make staying in the area more dangerous for him.
Sources
These notes come from r/Dariusmains, checked against the champions' abilities.