A friend of mine was running a deck similar to this, but found that Daxos just doesn't work out well.
Against aggro, they'll have some 2/X to block him with. Against Control, the lifegain doesn't mean so much (although you can screw with their scry a little bit), and against Midrange they'll usually just
zap the guy.
The real problems were with Daxos himself. You have to cast the spell the same turn you reveal the card, and a lot of the time, that is not the opportune moment. Also, because it is 'cast' and not 'play', Daxos whiffs COMPLETELY when he reveals a land (0 lifegain, nothing to cast).
Nightveil Specter does a similar thing, has a better body, and is more likely to get the job done. Also, due to its crazy devotion count, you could potentially activate
Thassa, God of the Sea or
Erebos, God of the Dead if you were of a mind to put them in.