Warwick vs Swain

Hold Jaws of the Beast (Q) to latch onto your target: you follow all their movement, dashes included, then leap behind them.

Cast Primal Howl (E) in the middle of the fight: you take less damage, then the howl fears nearby enemies. Recast it to fear sooner.

Cast Infinite Duress (R) on their carry: you suppress the first champion hit and heal for all the damage dealt. Your move speed lengthens the leap.

Follow the Blood Hunt (W) trails: you sense champions below 50% health and gain speed toward them, three times more below 25%.

Get out of the Nevermove (E) path as it comes back: it only roots on its return to Swain, then he can pull each rooted champion to him.

Leave the area as soon as Vision of Empire (W) appears: it strikes and slows 1.5 seconds later, and each champion hit gives him a Soul Fragment.

During Demonic Ascension (R), back off and hit from range if you can: he only drains nearby enemies, and his form ends when he stops draining.

If you have Grievous Wounds, apply it during Demonic Ascension (R): the drain heals him every second, and that healing keeps him alive.