Contrary on popular belief, Auroth is actually cute to be a waifu. So make haste and pick waifu for even better laifu :3

This guide consists of two style:
AGGRESSIVE build to enable Auroth HARRASS and NUKE enemies (still, let your carry secure the kills),
and practially DEFENSIVE build to enable Auroth focused at CROWD CONTROL and HEALING.

When playing aggresively, do not commitly hitting only one target at a time. Instead, spread your damage across mobs and grouping heroes.
When playing defensively, do smartly cast Cold Embrace and Glimmer as it can really prolong the battle. Use Arctic Burn and Splinter Blast to shoo enemies away and control their way.

You can choose either to suit your style. Both are still SUPPORT, means no/never intend to replace CARRY or any role.