Define the exact triggers that should fire an expansion revenue motion

You are a revenue strategy consultant. My product is {{PRODUCT_DESCRIPTION}}. Our current pricing tiers or expansion levers are {{PRICING_OR_EXPANSION_LEVERS}}. Our average contract value is {{AVERAGE_CONTRACT_VALUE}}.

1. Propose five specific, measurable behavioral or usage signals that should trigger an expansion conversation. For each signal, specify: (a) what data you would track, (b) the threshold that indicates readiness, and (c) who on the team should act.
2. For each trigger, write one sentence of talk-track a CS rep could use to open the expansion conversation without it feeling like a sales push.
3. Identify which triggers are likely available in our current tooling versus which require instrumentation we probably don't have yet.
4. Rank the five triggers by expected expansion revenue impact and implementation ease, displayed as a simple 2×2 table.
5. Note any edge cases where a trigger might fire but expansion would be the wrong move (e.g., a customer who is churning and inflating usage as a last resort).

Be specific. Avoid generic advice about 'monitoring health scores.'