I made a big mistake on my initial burst damage theory which needs updating, Shadow Fang has a potency of 440, not 240. completely messed up there.

It also appears to gain at trait at Level 44 which increases it DoT to 45 per tick.

This means Shadow Fang will do 470 potency at level 50, and 517 when buffed with Trick Attack.

So with this in mind the best burst rotation after Suiton --> Trick Attack should be;

Mutilate [396] ->Kraiton [396!] ->Spin [165] ->Fang [517] -> Spinning Edge [165] = 1474 1639

This is if you can get Kassatsu + Raiton performed quick enough to get 5 hits in With Spinning edge being the last, or assassinate if the enemy is below 20%.

Although if that isn't the case then the next best option is

Mutilate [396] ->Spinning [165] ->Fang [517] ->Spinning [165] ->Gust [220] Final Total 1460

This is also a lot safer as you have nothing to mess up, If you want to see big flashy numbers you can also swap Mutilate at the start for Aeoilian edge at the end, losing 44 potency overall, but hitting with a big number.