Here is my take on it. I relink the image
Merkabah
From the image we can see the blue ticans actually hit the wheels, you see a number of red 1 damage floating around. Seems like the defence of the wheels is increased. Really good on that.
Next is the interesting bit, from it it seems like the buff from merkabah actually adds a good bit of damage. 5k auto attack from the sniper? and 1.3k auto from the kabbalist i presume.
Multihit Chance
Not really sold on this either. The main problem is the cooldown and overheat this skill has. If it is on a cooldown of 10-15secs, it will be a good move, if it is 20-40sec+. We can forget about it, not really worth the trouble of expending 2 spells just for a random chance of +1-+9 hits. Nothing is said about whether it affects a single target or can affect multiple targets too.
Mob duplication
This is a rather nice spell for farming. Really great when we need to grind out materials on rare spawns.
For Kabbalist, think of it as a class which has gone towards more support and party than aoe dps. Even if the slow skill adds +10secs to cooldown, it will be easy to maintain that train with a chrono. Just pass and Kabbalist can do it all over again while giving the party a slow mobile safety zone with additional damage buffs.
The only thing i’m curious about is how will IMC implement 10 merkabah wheels. Even with just 6 wheels it is very hard to get the 5th and 6th to hit the target since they spawn so far away.