Nomad: Viable strategies

Hi all! Today I'm asking for help.

I like team Nomad very much. It is an unpredictable map in which level gaps can be a bit smaller if you happen to find a good starting TC spot or your closest enemy lacks gold, for example.

I'm low ELO, but I usually start with high points (even more than 100-200 higher ELO players)... until Castle Age. I usually follow FC BO and I'm good at balancing eco for 2 vill Feudal time, but I'm open to more strategies. In Castle Age I lose the advantage and enemies easily outboom me and get a snowball army which I can't handle. I specially struggle against Longbowmen, I don't know what to do against them (yeah, skirms, mangonels, knights, eagles, but by then they always outnumber me).

Can anyone give me tips for improving pushes? I mean, pushing when I have the advantage before I forget my TC in late Castle Age. Which Feudal Age pushes are viable and which Castle Age strategies are good? (I play random civ)

Thank you!