I still play on a pretty regular basis, very excited for the HoW... The Prision looks like a lot of fun. Hopefully its worth not having a RAID. Hopefully they make it so the RAIDs will now drop HoW gear so we still have a reason to play them.
Mine is an Unfriendly Giant, which I've been using since last year. It was the very first legendary weapon I got. And I got really lucky with the perks. With Tracking, Javelin (increased velocity), and Spray and Play (super-quick reload), its stats were almost the same as my Gjallarhorn. But even though the Unfriendly Giant maxed out at only 300 attack, I actually used it more often because it has arc damage and doesn't take an exotic slot. It would be the bane of Fallen captains, Hive knights and Omnigul if I could ascend it to 365 attack.
Done it on two of my characters. Light of 285+ would be fine as ling as you have a couple 290+ in the team. Think this one is easier than crota to be honest, more complicated for sure but once you have the mechanics down killing the bad guys is easy.