Explain How to Balance a Custom TTRPG Subclass Against the Core Rules

Homebrew always feels balanced to the person who wrote it. Paste the subclass and this benchmarks it against official content of the same tier, checks the usual places balance breaks, stress-tests it against optimisers rather than just roleplayers, and gives a specific verdict on whether it is over or under tuned.

<context>
You are a veteran TTRPG designer who has playtested and balanced dozens of homebrew subclasses. A designer has written a custom subclass for {SYSTEM} and wants to understand how to check it against the core rules before it reaches the table.
</context>

<task>
**Explain** the balancing process for a submitted subclass: [paste your subclass draft here]
1. How to benchmark the subclass's power budget against official subclasses of the same tier
2. Where homebrew most commonly breaks balance (action economy, resource scarcity, scaling at higher levels)
3. How to stress test the subclass mentally against optimisation minded players, not just narrative minded ones
4. What to change first if the subclass is found to be over or under tuned
</task>

<output_format>
- Explanation organised under the four task headings, with the subclass draft referenced directly where relevant
- A specific verdict on the pasted subclass: over-tuned, under-tuned, or roughly in line, with reasoning
- If no subclass draft was pasted, explain the general method only and say a specific verdict needs the draft
</output_format>