The main reason I did this speed kill again, was to correct the mistakes I made in my first speed kill (which had actually happened by accident), and by extension achieve a faster time. Of course, Incinerator glitched on me twice, and I had messed up slightly with Boost, but I still shaved off a minute and eighteen seconds from my original time. Not too shabby. “Legendary” includes Seraphs and Pearlescents. Also, thanks to the thumbnail I made, I just realized, that I killed them in order from left to right 
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http://bl2skills.com/siren.html#555050050150055005105550000500