I am contemplating Dragon Slayer since I have an XL400 in one of my BattleMasters... really have no desire to play with assaults at right now though. Would be more of an investment if and when I ever play around with the Victor chassis...
I did it because I wanted to start with KTOs anyway. If you already finished them it's not an easy choice I guess. I think it's a good replacement for KTO-19, though.