This is a pretty low model count list which means that a technomancer bringing back 30+ point models each turn is extremely valuable
imo. On top of that, having the canoptek cloak means you can heal something d3 wounds each turn which is always a nice touch. While I think the chronomancer has a solid place in the list, I think you'll get more value from the techno here.
The other option is make the wraith unit 3 man and then you've cleared up 70 points to ALSO have a technomancer. Just a thought.