I have them stand off and shoot from longer range.
And they're not illusions, they're hopes. 
It doesn't work the way you
hope it does, mbear, at least, not without a very cooperative opponent. See, 6/9 is low-average for a hovertank, on a VTOL, it's the equivalent of hanging your strategy on an Urbanmech in open-field combat.
Especially for the long-range sniper role, but also for any hopes you have to get that 'sneaky backstab'. To be sneaky like a snek, you need enough MP, and 6/9 isn't. Why? because unlike a light battlemech, VTOLs have to deal with a side-effect to flanking known as 'sideslip' and if you're hoping to be sneaky (terrain screening) you can't afford to lose control of your airframe lest it experience what is colloquially known as 'crashing into a hillside and burning up.' *or tree, or rocks, or buildings...
so for 'sneaky' speed is crucial.
for 'sniper' speed isn't a dump stat either-to get those sweet-sweet shots you need to be able to position quickly, the Gauss Rifle is a mid-range weapon when you don't have the blessings of being able to fire from cover or a hull-down position, and plenty of weapons can and will hit you if they see you-because a gauss rifle is a 'headcapper' and there's a pavlovian response to headcappers- "Kill it now!!!!" and in the case of your 6/9 vtol, with a gauss rifle, you don't have the durability to play that game, nor the manuevering to get out of trouble once you've gotten into it.
the lowest practical speed for a VTOL is 8/12, and that's only because of a single example that is successful because it carries a
Light gauss rifle-if you delete the Hawkmoth, your next lowest speed is 9/14, the realm of the Donar, Warrior H7 and similar light sniper designs-designs fast enough to play sneaky games and reposition quickly to deliver their shots, with just enough durability that in campaign play, the pilot might survive an unfortunate interaction with the terrain on a bad roll.
It's an unfortunate side-effect of the "Big Helo with Big Gun Go Boom" school of thought-it looks great until you're up against a canny opponent, at which point it becomes a liability because it only works under very narrow, friendly, cooperative conditions-conditions most opponents will not be obliging in giving you.