Leap: Eh, can't really scale range with just a stat I don't think. There could be 2 or 3 different versions of the skill, with better leaps requiring at least 20 strength or something like that.
Shove: Don't know if it's possible to make saves against the skill itself. I would quite like that, but would need a way to interrupt the skill very quickly. May be possible, but if not, a "StopSkillCast" kind of command would help a lot, and even enable sort of things like requiring rolls for successful casts of various spells.
Dive Bomb could potentially factor in weight, armor and strength for damage. Weight is tough because I think it would measure weight of all items carried as well, so you'd just have to be near your max encumbrance to max its damage, which is kind of silly. Again, distance is hard to tweak.
Concentrated Defense: supposed to be more of a skill that everyone will have that basically is a sort of last resort or no other good options kind of skill. So I don't it to be particularly great, but just a sort of option you can always have.
MM: Yup. Don't think Searing Daggers can miss as is? Could be higher versions of this skill that shoot more projectiles too.
Quivering: Resist could either be on the initial application, or a resistance that factors in constitution and stuff to reduce the damage it does when the damage occurs. Or something like each point in constitution would decrease damage taken by 1%. So using it on an enemy with a ton of health wouldn't be super effective (e.g., not a boss-killer kind of skill). Maybe the numbers would be 30% max health + 1% per dex - 1% of con of target.
The bigger idea of this skill is it's main damage is delayed, so potentially you could end up losing the fight before the damage actually hits.
Banish: Yeah, resist chance probably. This skill isn't going to have some really nice flavor. Basically, it will send the target to some kind of nearly infinitely repetitive reality (E.g., a huge labyrinth, or the library of babel (look up story by Borges), or a land of numbers where people are constantly calculating strange equations, etc.) For each second the character is banished this way in the real world, the target spends 1-10 days in this weird reality.
Basically it's a really evil spell. :P Could also have an effect like the character is dazed when they come back, since they were gone so long and forgot what was happening in the battle (and may not even realize they would come back).