Pretty sure answer is yes
Does {wild defiance} stack if you have 2+?
Technically, if you have two there just will be two triggers upon becoming a target. End result will net in +3/+3 for each defiance on the field, though.
(I do remember something about a ruling of the timing of "becoming a target" in interaction with {spellskite}. Lemme see if I can find it again)
Yaay. Thanks guys!