Has a Forward jump with a lot of AoE Ratio, but most of the times it misses since he jump very far most of the times… not so good of an attack. It is the old murmillo jump or the Dragon fall ability fron Dragoons.
The skill is his tail swipe, it hits 1 time in a wide area for very high damage, typically results in 10 million damage (will vary) and knocks down. Also grants Double Fang to you, the player, for 10 seconds which boosts Accuracy and Critical Rate for 10 seconds, tests seem to show it boosts them by 8%, he uses the skill every 30-50 seconds due to a 30s cooldown and RNG
Having tested it these are my results. It is a 10second buff and in my testing I found that he uses roughly 30 seconds after being spawned and every 31 seconds after that (average) So you nearly have a 30% uptime on this buff. I tested in bernice where Misrus is prone to CC so I had to kill mobs which sometimes left him without a target and may have effected these numbers some.
This needs further testing but my one test while fully geared; 6.9% increase in Accuracy
7.6% increase in Critical Rate
I think some values might be unaffected (for example from assisters and collections, as well as NPC/monster cards like Marnox card/May card) so the percentage is probably higher (unless you have 0 boost from any other sources)