Hi Maca, I am on day 3 of cross tapering 10mg escitalopram and 75mg Venlafaxine and like yourself I take 30mg Mirtazapine at night. Next week my psychiatrist is going to increase me to 150mg and stop the escitalopram. She says that at 75mg venlafaxine acts as an SSRI but it starts to affect the Noradrenaline transmitter at higher doses and this is better for anxiety. Maybe you will get a better effect if you increase again? It’s a scary thought I know (I also have a small supply of diazepam to take in case the anxiety gets really bad.)