follow zeenigami on youtube, he (almost) always make f2p teams for all the content, including colo.
by the way, i know, it sucks to not have a legends, my first one was when I had more than 550 days under my belt
I check it out a lot, most of his teams use Shiki or RaidSabo, sadly. Skillups have not been kind to me in that respect.
I don't feel too bad. I've got Inthawk who carries me through most things, and Sengoku for the rest where Slashers don't work. I just haven't seen a red since the 2nd anniversary, and it's a bit disheartening. I'm trying to save in the hope we get a guaranteed legend on 3-rd multi, in which case I'd be all in, or at least for G4 in... 5 months? Maybe.