Deciding on a Ninja Build

# Auto attack builds:
• Normal claw - agi crt str gr rd
• Special bow - agi crt str or dex gr rd

- pro: high eva, high pf doc damage, very low mp consumption, can spam doc with another gear set, functional from lv100
- con: low dps if you follow the typical gear build; might wanna invest on interfike and/or dual blow and physical autoskills if you wanna up your overall dps as an auto attack build

# Magic builds:
• Sk ninja (throw) - int dex crt gr bl

- pro: high damage, widely accepted in parties, mid-high pf doc damage, can play as a pure magic ninja, can spam doc with another gear set, comparably cheaper xtals than other ninja builds
- con: needs lv300, low eva without investing in eva+ stuff especially with spin shield, needs constant cloning cuz sk eats one clone per use and does more damage with less clones, investing in elemental weapons can be expensive

• Pure magic ninja (thow/staff) - int dex crt vit (for struggler) gr bl

- pro: can paralyze enemy, can clone and do damage at the same time with domination, can play as an sk ninja, can use magic counters to do more dps when soloing/tanking, more hp so losing clones isn't as dangerous as usual, future sk build assuming that the test server balancing is final, can spam doc with another gear set
- con: low eva without investing in eva+ stuff, lower overall dps without iruna jp skills and/or magic counters, counters useless if you increase evasion, skills have cast times and some are long

# Doc spam:
• Normal throw - int crt str gr rd

- pro: mid-high dps, high pf doc damage
- con: low eva without investing in eva+ stuff, low dps before lv140, needs -8sec skill delay to maximize dps, less clones = less dps, qc abi can be expensive, investing in elemental weapons can also be expensive

• Special claw - str crt dex gr rd
• Normal bow - dex crt str gr rd

- pro: same as throw, can use normal swords
- con: same as throw

Anyway, this is just how I view the builds. Let the pros out there correct anything I said wrong ✌

Lower level ninjas (under 300) are usually claw or doc spam (bow) build. Most ninjas over 300 are either Silent Kill or Doc Build (phantom flame buff). You also have the rare magic ninjas. I won't list the obvious pros and cons that are consistent across all ninja builds, like how they are all weak to poison, etc.

Claw Build: 
Pros
-CHEAP 
-Easy MQ and leveling early on
-Very strong solo early on
Cons
-Very slow grind X.X
-Does not fit in party well
-Low damage after 200 or so
-Low boss farming/ mob farming ability
    -also no good way to make spina

Doc Spam:
Pros
-Good damage
-decent survivability
-good solo and grinding ability
-Can use Phantom Flame well at 320+
Cons
-a little bit expensive
-Running out of mp to spam
-Not survivable enough to fully solo, but not quite dps enough to carry a party...
    -Decent gear will always help

Magic Ninja:
Pros
-You can solo just about every MQ with a pet (maybe even without)
-GOOD Damage
-Fits well in a party, no problem with hp healing/bless
-Can adjust build for Silent Kill more easily at level 300
-You can kill 3i at level 180 (I have done it with my magic ninja)
Cons
-Dies often, more vulnerable
-Slow grind if fully soloing mobs
-Timing is strange and sometimes a bit difficult

TL;DR: Claw Nins are cheap, but weak. Doc Ninjas are well rounded, so I recommend. Magic ninjas are only good for certain types of players, so only go for them if you are daring or rich. 

I'll give you a cheap answer, since you can't afford Ganei yet.

Weapon: The most common doc spam weapon is a bow. I like Moonlight Bow, but feel others for more dmg, cheapness, or elements.

Armor: Schwartz (not upgraded)
-30%MaxHP

Additional: Ghost Ring (not upgraded)
-20%MaxHP

Special: Magical Ring
-40%MaxHP if under lv 200.

Total: -90%MaxHP...You will need a spare piece of armor or add gear that adds hp, or is slotted with a MaxHP+700 xtal, so when you switch armors to clone, your hp drops low enough.

You can only survive with this. If you want better damage, mp cost, etc, you will need to buy ganeis and gear meant for spamming. You can look at the ninja cloning guides for more gear suggestions.

Edit: here's the link to the one with info on cloning too: irunaonline.boards.net/thread/6010/ninja-guide-wip

You dont need -8 sec sd since full qc abi will hurt your dps & wallet. Furthermore, with future update, 3 clones doc can do 500k+ damage with less sd recuirements. So, in my opinion, get at least -4 sec sd gear for doc for your current dps set (only use 5 clone to spam doc) & preparation for future update.