Soul Ring into a self cast Purification is a free lane nuke, the heal refunds the HP cost while damaging every enemy nearby.

Heavenly Grace is a strong dispel that grants status resistance, so hold it to save a caught ally instead of pre casting.

Play him as an offlaner or hard support, in the offlane his sustain pressures the enemy carry and support while denying farm.

Save Guardian Angel until the enemy carry commits their physical burst, the immunity then wastes their entire damage window.

Guardian Angel enables safe tower dives and Roshan attempts, so coordinate the cast timing with your team before fights.

Heavenly Grace grants bonus strength and regen for each debuff on the target, so cast it on a heavily cursed ally for value.