I would propose Armour and Evasion -_-
though that has been a quirk of mine for sometime, not that anyone ever cares to put it to the test, but as a combinatorial defence, especially one consisting of the key advantages of evasion (evasion does not 'cap' at 50%+ but that is one of the defining points since that range will introduce a double roll, chance to avoid, on successive hits or something along those lines) in conjunction with good armour values being derived from the same hybrid nodes (the 12% for both defence types). It is not as straightforward as standard styles but the combination produces its own advantages in synergy (and not just by way of both types working as they might independently).
of course there is the Iron Reflexes notable, but I have mixed feelings on that, since it seems to only be there for the benefit of 'everyone' who eschews evasion as a viable melee defensive style. In any case there is also Mind Over Matter which as an approximately close selection for Rangers to incorporate heightens their evasion style defence, and in my opinion, is especially good in conjunction with the Armour - Evasion combination. Since I believe the conversion goes through the damage reduced by mana firstly and is then modified by armour. This with the Ranger's advanced flask healing abilities makes for a sufficiently robust character, and one that is adroitly styled on the Ranger's concept of finesse.
otherwise, yes, Acrobatics is very powerful indeed, and then there is Acrobatics and Mind Over Matter etc If a character is not incorporating Armour then they would in all likelihood be selecting Acrobatics. However, although not popular, for points and cost the Scion area allows for an Evasion-Energy Shield and life styled character, although they might be even less common than Armour-Evasion styles. I actually know someone who, much like my quirks with Armour-Evasion for Rangers, always endeavoured to create their Shadow around Evasion-Energy Shield, have not seem them for sometime, and from what I could tell they have some reservations over the possible viability of this style. But Evasion, is very useful when properly designed around, it is just that the game tends towards favouring simple efficiency as a mode for surviving the vagaries and increasing difficulties of the hardcore leagues (when spontaneous freezes occur, for instance).
edit: to amend previous statements, Mind over Matter modifies damage after all other forms of reduction, and so I need to see how close my level 50 Ranger is to said notable.
