I have listed some of my stats here so you can compare...My Ninja is pretty good as a close in killing machine at only
level 9:
St 65
In 62
Pi 33
Vi 62
De 72
Sp 72
Se 62
Ranged weapon is currently a heavy crossbow using hunter quarrels:
Heavy crossbow - to hit -1, intiative -3
Hunter Quarrels - damage 7-16, drain stamina 5%
Close in is a Sai for primary and Nunchaka for secondary:
Sai - initiative +2, kill 5%, to hit +1
Nunchaka - initiative +2, KO 15%, to hit +1
The close in weapon's positives balance out the ranged weapon's lack of initiative and to hit.
The trick is to give him two melee weapons and stick with them:
Dagger 43
Mace and flail 11 (got the nunchaka just recently)
Critical strike 68
Close combat 54
Dual weapons 40
I am rethinking the nunchaka. I thought the 15% knockout would be cool but I think another dagger type weapon would be best to up the dagger skill quicker and really take advantage of the critical hit bonus. If I can get another dagger with a kill bonus I will make the switch. Also I am switching to a long bow once my quarrels run out so I get the close in weapon's intiative and to hit bonuses. Using barbed arrows is equitable to the hunter quarrels so it is time to switch. I am just accumulating darts, shurikens, and throwing knives at this point but still get some gradual increase in the throwing skill by using powders and bombs as needed.
So my advice:
Forget the throwing items as a main attack, you just don't get critical kills in this game like you did in the previous ones. Make them the alternate primary/secondary when you can get them. When they are in short supply set a bow as the alternate primary. For the main primary and secondary go with two dagger type weapons with kill bonuses such as two sais or two stilettos or a combination.
Also, darts (poison and doom) are good throwing weapons easily bought in small quantities from almost everyone, accumulate them at every opportunity but use that bow when in short supply!
Hopefully you have maxed your critical kill skill when leveling up. I don't seem to get many critical kills in this game although I did dispatch a full health hogar with one swipe!
My Samarai is the disappontment in my party, zero critical kills to date and he whiffs way too often with a sword skill of 80!
I am really disappointed in the critical kills in this game.
Grim Reaper.