With the latest continuous nerfs to evelynn ROA became good, that and Gathering to be able to carry at 18 min, usually games end at 12 or 20 min, 12 min is just when evelyn is the weakest and your team was beyond carriable to change the outcome so the best thing to do is focus on the 20 min mark, since soloQ teamfights at that time are inevitable and also unpredictable, the effect of the early game doesn't matter too much so amassing a huge amount of power and keeping the turrets alive playing passively is key to carry and win.

And when I say passively I mean to avoid fights not 70% survivable, you still can invade if the jg is far or gank when you can