Tip
Keep in mind that Cassiopeia’s Miasma (W) prevents Irelia from using [Q]. Look for an opportunity to close in while avoiding Cassiopeia’s (Q)-(E) combo.
Irelia vs Cassiopeia

Keep in mind that Cassiopeia’s Miasma (W) prevents Irelia from using [Q]. Look for an opportunity to close in while avoiding Cassiopeia’s (Q)-(E) combo.