As she is a variant of the type 9, her armor is too high. We have Type 9's already at armor 3. Now she is bigger and faster at the cost of mobility, so I think we could justify making her armor 4. Giving her a 5, like the type 21 is a bit ridiculous....
An A/VA/H of 4/6/2 would be fun with Vital Cargo—she could hang out near an enemy island, and vanish at the end of the turn. Secret Cargo would also work though
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