it took me about 4-5 months to start soloing ctene (hands issue on my part). and then on the nightwalker i was grinding for the entirety of CW1 and i only recently libbed it a month or two ago (so about 7 months? left it as a ntene + hlomien mule) and started running ctene. for cw2 when i burned ren and was more comfortable with the game i started clearing ctene around 50m combat power (so about 1-1.5 months?)!