I got lucky on Onion Knight and got it on the first WoD run after the update. I didn't even know cards dropped from duties at that point until I figured out where it actually came from.

That being said, my other ventures have been a bit more difficult, but not as bad as some I've heard:

2-3 Runs
Siren
Ahriman
Ultros & Typhon
Gilgamesh & Enkidu
Rhitahtyn
Ultima Weapon
Tonberry

Around 5 runs
Bartz Klauser
Gaius

Around 10 or so runs
King Moggle Mog
Terra Branford
Chimera (wtf)

All in all, I guess I've been pretty lucky. Still scored like crap in the tournament though.

For Triad battles, it's been pretty random. I've gotten most of the cards I actually want in varying degrees, but Vorsaile simply refuses to give me Kan-E-Senna; I'm pretty sure I've played him about 100 or so times, and I beat him regularly now since I can use a primal ascension deck.