How bad can Ilyah's problems be?
As long as he's not love-struck or fooled into stupidity by some Spirit Summoner, with his current abilities, there's a 90% chance he can solve Ilyah's problems.
Wanted by Hell?
No fear, he has connections in Hell, even a second-level Grim Reaper. When the time comes, he can work some magic to get Hell to cancel the warrant for Ilyah.
Wanted by the Divine Realm of Heroic Spirits?
No fear, he knows deities in the Divine Realm. Awaken Sophia, sweet-talk her, promise her a few benefits, and with their friendship, the Valkyrie probably wouldn't mind making a trip to the Divine Realm of Heroic Spirits to get them to cancel the warrant for Ilyah.
He has friends in the Divine Realm.
He has the Grim Reaper in Hell.
Utilizing his connections, he doesn't believe he can't settle Ilyah's little issues.
As for the Human World...
With his current strength... he should be considered nearly invincible, right?