Baizhu provides teamwide healing through the use of his Skill, and heals the active character from his Burst. The shields generated from his Burst should be considered as interrupt resistance as opposed to a reliable form of damage mitigation for non-Bloom reaction related damage sources. Due to being a Dendro catalyst, Baizhu can work effectively in a large range of different Dendro team archetypes.
Baizhu's Skill has a 2-3 second delay between cast time and heal received, keep this in mind when swapping to low HP allies after Baizhu's rotation.
Regarding Weapon Choices:
Prototype Amber: In addition to the amount of flat energy generation for the user, this weapon can provide significant team-wide healing when used in conjunction with Healing Bonus. It is a great option when using Baizhu with Furina for building Fanfare points from the second rotation onwards.
Favonius Codex: Try to build some CRIT Rate if using this weapon to trigger the passive consistently.
Hakushin Ring: This weapon is best used in Quicken teams when Baizhu is able to provide reasonable uptime on the buff.
A Thousand Floating Dreams: This weapon can be considered in certain teams for the modest Elemental Mastery team buff it provides, though there are generally better uses for it.
Regarding Artifact Choices:
Sets
Deepwood Memories (4): Under AoE situations, it may be better for another party member to hold this set as Baizhu has lackluster AoE.
Instructor (4): The Elemental Mastery gained from this set outweighs the reduction in A4 passive bonus from lower main stat values.
Noblesse Oblige (4): In teams that benefit from ATK%, this set can be run over (4) if the additional sustain from higher HP values is preferred.
Main Stats
Healing Bonus: While generally in teams that can benefit from Baizhu's Ascension 4 passive you want to build high HP (up to 50k) to maximize the buff it can provide, Healing Bonus circlet can be considered over HP% in teams where having more healing would be valuable. For example, using Healing Bonus circlet can allow for building Fanfare points faster when using Baizhu with Furina, moreover Healing Bonus circlet synergizes well with 's passive.
Substats
Energy Recharge: Prioritize until requirements are met.
CRIT Rate: Only recommended if using a Favonius weapon.