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I stopped grinding my Tornado because the later UK MRs doesn't look too good.
Can't speak for the Shindens yet other than they have scary firepower, bots often fly them slow + high & they have an annoying tendency to turn inside me -> have to extend a bit before turning to get a good shot.
I can talk for UK MRs:
Tornado is really nice, you share the same guns as Hurricane II, available stock, similar agility but a lot more speed.
Typhoon is harder, you need to have at least 18k Free XP prepared because stock you're slow and equipped with short range peashooter 0.303s.
12 of them put out reasonable aggregate dps sure but its really hard to get them in range & on target.
So you need to research the upgraded Airframe and the first lot of 20mms in order to get some firepower & neither set of guns is shared.
Probably best to add another 12k Free XP to get the first Engine too.
Non-Specialist you only have one Engine slot, no Airframe so you can boost either agility or speed.
Make sure you have the Engine Cooling consumable for that periodic Boost replenishment to help keep your speed up.
Tempest & Sea Hawk then have 20mms stock which makes them much more reasonable stock grinds.
While Typhoon is a bit of a backward step in agility from Tornado, Tempest is back to below 10s turn time.
Still kinda iffy about the Hunter, really want to like it but its pretty hard work so far.