But consider this - without Viera, Arsenal will be without a Captain who can defend and pass the ball. I guess, from end of last season, Viera's contribution was undeniable when we saw Arsenal without him, but nevertheless, Arsenal have a decent midfield.
But in terms of strikers...
But with Henry, Arsenal is like a blunt sword. (I mean, if Henry was injuried for the opening match against Everton, he wouldn't have made one of this drives which Pires would eventually capitalise on. And without Henry, Arsenal wouldn't have got that penalty.)