Yeah, it's getting ridiculously long. I wanted to use anchor links, but couldn't find anything to work. I think @jinjinjinrou was looking into it. I recently found someone with a solution at support.proboards.com/thread/430786/anchor-post-feature. Hopefully when admin has time he can look into it.
As for the Zenith Perk, it increases your attack by a % for your MC's weapon types. It goes from 1%, then to 3%, and up to 5%.
So for Sidewinder, if you max it out on the type 2 then all guns will get a 5% boost. Applies only to MC. But yeah the 1st perk gives 3k attack which is a lot better.
Fuuma Shuriken also unconditionally sets mark counters to 2.
Sidewinder's Zenith skill.... I'm sorry but I laughed out loud (absolutely no offense!!). The "Steady Aim" status is a debuff that does nothing, specifically there to increase Killstreak's (and other similar skills') damage. People already consider Sidewinder's Zenith skill to be trash, but your version of it just made it a worse Ogre's Fighting Spirit
Also, Bishop's Zenith skill is "Veil" I believe. "Bell" would be 「ベル」。