If you're already ahead enough that it can't be contested by enemy mediums its sometimes worth it, but otherwise its piss-poor mobility is usually a death sentence.
Yeah the whole "slightly more acceleration than a kt" mobility design given to the centaur. It's not (like the description says) very heavily armored so in my limited experience with it it usually dies to anything of equivalent size. I'll usually keep it by a hedge or something to dodge behind if a tank or pak shows up. I kinda got used to the usf flaktrack so I can keep centaurs alive decently.
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