Concerns of The Deep? I'm Cubin'

Buy left to right
Healing Rite will upgrade into Rescue Beam
Don't forget to pick a Healing Starter item which will help you keep your laning partner alive! The Spirit items will help you deal damage to your opponents with Splatter (1) any time it's off cooldown.

Pick Restorative Locket if the enemy spam abilities
Guardian Ward in other situations
Healing Nova is more expensive but will allow you to heal multiple people.

Buy left to right
Your objective is to save your allies from impending doom by using your Cube (2) on them, and then using Rescue Beam on the Cube to pull them to safety! Positioning is key, so always try to remain behind your allies rather than in front of them
Once you get Echo Shard, you'll be able to Double Cube your allies! Don't be afraid to grab another Active from the lists on the right
You can sell Guardian Ward for a slot if you bought it or upgrade it.

If you find yourself dying a lot, or simply taking a large amount of damage, consider one (or more!) of those items.

Upon acquiring Alchemical Fire, you should always throw it at the enemy during any fight
You can consider some of the Alchemical Fire Debuffs items below to empower Alchemical Fire with various debuffs! Your allies will thank you! If you feel like Alchemical Fire will not be useful during your match (Too many flyers or too much mobility), skip it then consider one of the Debuff Actives or Support Actives to turn the tides of battle!

These will help your team take down strong opponents easily! Silence Wave, Curse or Focus Lens are recommended.

All of those items will trigger once an enemy steps on the fire of Alchemical Fire or when you hit them with Splatter (1)!

These actives can give your team a huge advantage during a fight or one specific enemy! If you bought Guardian Ward, feel free to upgrade it!

These items are NOT part of the build but can be bought to create a playstyle that suits you more
Consider Healing Tempo if you have Healing Nova!