User blog comment:LhantYS/Rainbow Team F2P In Progress Needs Help/@comment-24840002-20141014073701/@comment-202.156.15.42-20141014125021

Well seeing the number of RS units he mentioned is quite little, his level might not be that high for other 6* to put in. Miku is IMO a better choice than Vargas, since that Miku 5* BB is quite good for filling BB gauge (fills 3 BC each turn). He might as well use Miku instead and save the cost for a better Dark/Fire unit than to use Vargas, since ultimately the goal is to help him spam BB faster. I would prefer using Miku as leader too but its up to him. Using leaders like Miku/Deemo also removes the restriction of the must to have a rainbow team too.