I'm sure Christie would have been signed as one of potentially three openside flankers in the 38. Harmon has been outstanding this season, but he's a midget so it'd be nice to have the option of a bigger 7. Christie is marginally bigger, but not markedly.
Personally, I'd love to see James Lentjes come back to Christchurch.
As far as the possible Ranger signing goes, in isolation yes I like it as have always rated him. But I don't see the need for a 13 in this squad unless they plan to use Goodhue at 12 (blerk) and want a more experienced option to Ennor.