Went 1/2 as rdm/nin. He caught me with Earthshatter once when I was recasting, other than that, it's not a tough kite fight at all. Had no +movement either, just took him to the teleporters, like Rumo said. Just watch out if other people are nearby, he dropped agro 3 times, even with Bio on.
Boompadu pops at I-7 about every 2 hours and has slow movement speed, making it easy to kite for any job even without movement speed+ gear. Easiest way to defeat it is to kite it around the teleporters in the middle of the map while keeping DoTs up. If you want to nuke, Water will be your best bet. Took me about 45 minutes to solo it that way as RDM/NIN . It will de-aggro after a short time, giving you the chance to reapply your buffs or cast tier III or higher nukes without being in danger of getting hit. Went 1/3 on the subligar which is ugly as hell, but an incredible ws piece.
Solo in 22 minutes as blm/sch. really need parsimony water4 and sublimation or you just wouldnt have enough mp to finish it off. keep bio2 on and nuke when it deaggros. 0/11 on drop so far.
Solo'd in 17 minutes very regularly on RDM/SCH. Toss Alacrity Water3's whenever you have a stratagem, keep bio2/poison2 up, use Parsimony nukes if you lose aggro.
Why would SEI add slow+8% to these? How is that even remotely balanced that jobs like WAR and SAM get Byakko's haidate which have stupidly broken stats, and this does more harm than good for anything other than WSs? SEI sucks at life <.<;;