having HNM's with a 6-9 hour re-spawn timer would be great, personally I think 24 hours is a bit long but 6-9 hours would be perfect in my books. Also having the ability to spawn HNM's with trigger items you would buy with Grand Company points (A lot of points) would be good too. This way people who love the rush of camping HNM's and claiming could have their fun, and people who don't have the freedom of being able to log on at random times for a spawn window could just farm grand company points for a week or two and buy the trigger item and force spawn a HNM during their play hours.