This is important!!! Almost always throw poop at your opponent, come prepared with Blooming Purple Blossoms, and apply Poison Pine Resin at the beginning of every fight.
Apply the resin on Guardian Tail and it will work almost similarly to Large Club in that the poison status will build up relatively fast with the exception that it (the Guardian Tail being a whip) can't be parried and half (or maybe less than half) of the damage that this baby is capable of dishing can bypass shields.
Apply it on the Iaito and it will deal both poison and bleed status. You can swap the Iaito for other Dex weapons with less than 15 Str requirements, such as the Uchigatana, Partizan, Balder Side Sword, Rapier, etc.
Black Bow of Pharis with Poison Arrows are there to supplement your status inducing capabilities.