Seeing this dynamic level system coming down, I feel like I should pull up my socks and knock out the holo-sim achievements. My question for you all is this: Who is best suited for the 50 waves? And, possibly more importantly, at what level should I start? I heard that doing it below 60 is pretty much a must.
*Note that I can't use Rogue, Widow or Thing, as they are already maxed out.
Thanks in advance