I spent a while trying to finesse the Valerie's waypoints to have her fight 'smarter', but it turns out the deck was already enormously stacked in her favor - she had 20x engine toughness and more than double hull toughness, whereas the Indus got nothing - so I left her with a bit of bad helmsmanship while evening some of the other factors in the fight.
Sorry for the late post, but I'm curious (and eagerly awaiting updates on the upcoming models--no pressure intended, just in love with such awesome work).
Why not, perhaps, remove the double hull toughness (and much of the engine toughness), but make her maneuver more intelligently? If it did work out well enough (and I don't know if it would, of course), it would make for a much more entertaining and interesting fight between the two ships. Since the dialog in the mission doesn't mention any meta-factors coming into play with regards to increased durability or whatnot, wouldn't it be easier to follow/better for immersion if the (visually explicit and demonstrated) reason for the Valarie's destruction wasn't due to jarringly bad maneuvering (or lack thereof)? Or, perhaps, you could retain the current dynamic by having the opening salvo from the Indus be a lucky hit (in part due to the great positioning it got when jumping in) to the Val's engines, drastically curbing or outright disabling its maneuverability.
Obviously, this is just speculation; I haven't done any testing with it, so I trust your judgement. Again, this is more out of curiosity than anything else.
EDIT: Missed a post up there, sorry. Though that does leave the question about the possibility of making the Valarie crippled from the opening slavo of gauss cannons from the Indus' (possibly accidental) shock-jump flank attack. It would help to mitigate the Worf Effect plaguing the Diomedes class right now and not make the Valarie's captain confusingly dense.
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As an aside, what exactly is the deal with the Hyperion-class cruiser being so large for its capabilities and role (assuming it was due to the necessity of working with the existing model and its size), especially given that the Aeolus is roughly half its size while being (relatively speaking) almost as effective in every aspect?