On l2inc 1sec before you enter oly fight use gem, ziggo or normal npc buffer and you will have full buffs in oly
dunno about other servers didnt tested
best strategy for bd is feed since it isn't an oly class lol
but still if you really want go open oly wear ic + s dual + drac bow [focus]
dance fury,fire,warrior, con , wamp ( vs daggers use +Inspiration ) (vs sps +Aqua Guard)
dyes : i would use +5str -5dex
Use conversation sa weapon so you will loose 40% of hp
then use Crush of Doom , Armor Crush and Earthquake skills to lower your hp to 30% then use cursed dagger risk haste and use frenzy,zeloet.