The commonly used build doesn't spam skills correct. That doesn't mean it's not viable to use.
Critical Shot's [the forced ones] will crit even if you have 0% crit chance. So class passives are void in that situation.
Here's an arsenal of builds possible with Bow Scouts:
Crit Build : Skill Spam
Stat wise, invest into Dex = to PA / Exalted. Con = 50-100% Char level, Remainder to Sen
Skills:
Entangling Arrow, Shackle Arrow, Clamp Arrow, Fire/Ice/Wind Arrows, Phoenix Arrow.
Tactics:
First Change your Targeting option to "1st click select, 2nd attack".
Select the Target you wish to engage, [preferably while in Camo]. Start with phoenix for that initial burst. Rotate your Shackle/Clamp/Entangling arrows, Phoenix Again, rotate your Fire/Ice/Wind Arrows, Rinse, repeat.
Note: This method rely's on being able to effectively Kite while casting, having keybind macro's helps significantly. You'll want to "circle" or "slalom" your target. Casting inbetween GCD's.
Trap Build : Group Support.
Stats: High Dex, Mid Con, 3rd optional [CHA in rare cases]
Skills :
PvP Poison Arrow Shower, Phoenix, All 3 traps, PvP Impact.
Tactics:
Your goal is to harass the enemy team relentlessly. Siphoning the Cleric as often as possible. Stunning enemy's who are targeting your cleric / mage. Rooting enemys who dare to enter the AoE pits etc. There's no true rotation to this class. Try to keep up your PvP Poison Arrow as often as possible, and your status downs. Having DoT's and garbage downs increasing the chance that the stronger debuffs [Aurual, PvP Circle Break, Crippling storm etc] are not removed, because the puri may remove the DoT instead of those valuable status'.
Aspd Build : Constant DPS
Stats : Dex = PA / Exalted, Con 75-100% level [at cap 185-230] rest CHA
Skills :
Aspd passive + Buff, Dex passive + buff, Mspd passive + Buff. Stun Arrow + PvP Impact, phoenix.
Tactic : Click, Phoenix, melee for a bit, stun, melee a bit more, impact [hope for a stun] melee a bit more, phoenix, [you get the idea, you don't do much of anything other then keep a range and stun / phoenix when it works good]
AP : Ranged Ouch factory
Stats: Dex 350, Con 300-350 [up to you] rest Cha/Sen [if you have self buffs, cha, none, sen]
Skills: Prime damage skills [phoenix etc up to your preference] Passives aspd + [crit + crit damage if you built sen] essentially this build is entirely flexible, it has no real skill build, pick what fits how you're going to paly.
This one comes down to EQ more then a perfect skill build. You're going to be maximizing AP where it is possible, and Aspd where it's not. [if neither are available then go for Dex/Con both produce vital core stats]
The reason this build is effective is because you may not crit all the time, boosting AP, means when you do actually crit, you'll gain an explosive power increase.
That's just 4 off the top of my head, all can be changed, all can be improved or modified. Some is up to preference, and some is debatable. In the end, if you know your scout, you understand what it's supposed to do [hit and run] and understand what its not supposed to do [tank] then you're going to be more effective.