About melee Vs ranged I think it's the kind of thing you decide during the fight(until we upgrade the taravangian to provide more data, if that's possible ).
The turtle could have a dangerous melee attack, or a damaging aura, or maybe it's weak in melee but has powerful ranged attack, or some strange power, it will take us a few rounds to learn and try to counter it.
Unfortunately I just realized emiko barrier isn't going to matter, the turtle has higher ATS than her deflection