Weekly Team/Character Building Megathread (Dec. 15th, 2021) (feat. Itto)

A megathread dedicated to team/character building Q&A.

Do not post questions irrelevant to team/character building here. They should belong to the Daily General Question Megathread.

If you have a comprehensive theory (rather than a question) about how to build a character or a team, you are encouraged to make a dedicated discussion thread outside this megathread, as it can help general players.

This week's team/character building megathread will feature Arataki Itto. If your question involves him, you are strongly encouraged to start your question with an "[Itto]" tag, like this:

[Itto]
insert your question

If your question does not involve Itto, the following template is recommended:

Character(s): insert character(s)
insert your question