When to use higher reasoning?

A user on Reddit is seeking advice on when to utilize different reasoning levels (extra high, pro, pro+ultra) within a chat-based brainstorming workflow, particularly after upgrading to a "Pro" subscription. They currently brainstorm in chat and then use a codex prompt in VSC, but are unsure which settings to apply for the codex prompt and when higher reasoning is necessary for complex prompts, noting that "extra high" is best for general chatting and brainstorming.