It's been a few years, but as I recall HKG is not a great place to start a run. Fares on legacy carriers (especially CX) are pretty high despite LCC competition. If you've got the stomach for it, you can try starting a run in BKK or TPE and then sort out positioning flights. Depending on how "mid" in April you're talking, you'll also run into a problem with the Easter holiday, April 21 next year, which is a big travel period because it's a long weekend in HK.