Thank you for the thorough check.
regarding the opener, I tried to copy what I saw in some really good parses (who did differently from the guide, they start with aimed into black arrow). I did precast, the first aimed shot in the log is actually the second. Bad idea, I'll revert to the guide's opener
I would need to have a recording of the fight to know what happened at the screenshot for example. What I realised specifically at sikran, I get brain overload when I get mechanics and position myself for the dashes and tend to skip a second or so of my rotation.
The canceled casts were mostly the swirlies, where I still wanted to send off aimed shots. Should have went arcane shots instead?
I have never considered bullseye stacks, thanks for pointing out, will check