Hello again, it's me, not leaving well enough alone...again. So first off a minor book-keeping thing I forgot to put in the last update you guys earned +2 XP towards increasing your Lore from the last update. Got it? Good. I'll delete this after a bit, just figured I'd let people know in a threadmark.
The main thrust of this is that I'm revising the Chakra Rules (again) because I'm not happy with their previous iteration (again). Largely because they do not line up with what I'm actually envisioning. We see multiple instances in canon of genin learning fairly advanced techniques, and under the current system that just doesn't work. So I'm changing it.
From now on (and I'll update as necessary), the Chakra Pool will largely stay the same (for now at least). However, Justu will now require a (Wits+Occult) check to Cast (Ninjutsu and Genjutsu are both valid specializations). The level of success required to successfully cast is determined by the Jutsu's Difficulty.
Difficulty Ratings (Examples):
E-Rank: 1-2
D-Rank: 2-3
C-Rank: 3-4
B-Rank: 5-6
A-Rank: 7-8
S-Rank: 9+
So each Jutsu has a Chakra Cost and a Difficulty Rating, so once you've learned how to properly cast the Jutsu, as long as you have enough chakra from the cost and pass the check you successfully use the Jutsu. Simple enough. If you miscast a Jutsu, you still pay the cost, but nothing happens.
Chakra Skill:
I'm keeping the Chakra Skill system, because I do like it, but what it is affecting is changed. First off, it no longer affects what Jutsu you can learn. You can technically learn any justu as long as you have learned any prerequisite Jutsu (whether or not you can actually cast it is another matter entirely). Instead, Chakra Skill gives automatic successes towards casting. So, as Tenten currently has a Chakra Skill of 2, she gets 2 automatic successes towards any Jutsu she wants to use.
The other usage of Chakra Skill is in determining how much Jutsu cost. The base cost of a Jutsu assumes that your Chakra Skill is equal to the Jutsu Difficulty. If you are casting a Jutsu that is more difficult than your Chakra Skill it will be higher (the bigger the difference, the higher the cost). Likewise, if you are casting a Jutsu with a difficult lower than your Skill, the cost will be low, or even negligible. The exact malus and discount rate is something I'm still fiddling with, but I should have that ironed out by the end of the day.
Finally, yes, to answer the obvious question, this means Tenten can cheat with an Occult Excellency to use Jutsu way over her head. However, you still take the penalty from having a low Chakra skill.
If anyone has any questions or comments, please let me know. I'm still ironing this out, so now is the time to provide feedback.