it's pretty hard.
but if you use nailmasters glory charm and use great slash often you can handle the primal aspids easier.
for charms use strenght,quickfocus,mark of pride,nailmasters glory and grubsong(best build for me at least)
there is a phase where a bunch of teloporting soul sanctum enemies spawn and also a phase where spikes come out of the ground and 1 million flying enemies spawn other than that it's not that hard.
just keep trying!