depends on the build imo. for zvz, i think that a 2 passive > 1 zon. you'd only get 10% more dmg on guided arrow, and +1 to jab. you get an extra % to crit (possibly), extra % to dodge, avoid, and evade with 2 passive. not to mention your valk/decoy will have higher life and maybe tank an extra arrow.
my lvl 30 norm rush bowa had 940 guided and 42x life, used an ashwood, maxed plate, and a nice rare circ (20 frw, 40+ life and mana, all resist, etc..)