So we've noticed. Please don't disrupt conversations with that.
As for Wyyrlok, I actually quite like him. He has been in the background for most of the Legacy comics, but in this filler comic it was quite entertaining to see how he operates.
As for Andeddu... I am going to take the 'He has been dead for thousands of years' route. Call it a resurrection if you like, but the fact remains that, for all his power, he hasn't actively done anything in milennia. I am sure that would have weakened him.
Also, I believe he was in his own body, but that he absorbed the life force from the silly Cultist.
Furthermore, it was a battle of the mind. At the end, we see that Wyyrlok has only killed Andeddu but not destroyed all the books and knowledge that he seeks. That may be a factor as well, that they battled mentally rather than physically.