Imo the best setup is war bow (Frostseeker). High INT, DEX and PER, decent MIG. Marked Prey, Stalker's Link, Marksman, Driving Flight. Usually ascends very quickly due to Garland's Rake (enchanment on the Frostseeker bow) and then you can cast for free while ascended. It is benefical to use Borrowed Instincts for more crits, because more crits = more Garland's Rake.
This is a very strong combinantion bc. Cipher/Ranger has one of the highest potential accuracy and crit chance in the game which works very well with the bow's critical hits which produce AoE damage.