stacking spell effects

[sihtzu]

choke , frost , drown , rasp , burn , shock
dia II I , bio II I
poison II I

anyone knows exactly what can stack with what ?

so far , from what i can gather from the forums
bio II >> dia II >> bio I >> dia II
and a diagram on the stackable rasp-series spells

but can dia series stack with the poison series and rasp series spells ?

I did both choke and dia II , choke seem to overwrite dia II.
Whenever i casted choke and dia II, i would get a "choke effect off" message but if i casted diaII without choke , i would get a "dia II effect off" message.

btw , is poison II worth it ?

[Apple Pie]

(A) BLM Enfeebling Spells
Burn, Choke, Frost, Drown, Rasp, Shock

(B) Poison series
Poison or Poison II

(C) Dia / Bios series
Dia, Dia II, Bio, or Bio II

(A), (B), and (C) all stack.

Whenever i casted choke and dia II, i would get a "choke effect off" message

You may wanna take a look at this.
http://www5.sppd.ne.jp/grendal/FF11/Chork_Dia2.wmv (Sorry, I'm using JPN client)

On the movie, I first casted Chork and then Dia II but I didn't get message like "choke effect off" when I casted Dia II. After a while, I saw both "Chork goes off" and "Dia II goes off" respectively. So, I'm 100% sure they stack.

As for Poison II, it is much better than poison. It lasts about 90 seconds to 120 seconds and its slip damage is our skill (enfeebling) dependent. I think it does something like 9-10 damage/tick --- Total 300+ damage in 120 seconds?

P.S

It's OT but I'm Just back from Castle Oztoroja with my sword skill fully capped (= 202). So, I am now able to use Vorpal Blade. Well, I love it.
http://www5.sppd.ne.jp/grendal/FF11/Vorpal_Blade.mpg