After a day and a half I finally defeated the Githyanki Patrol. I started  out  with a  Dual Wielding Ranger,  Laezel as an Eldrich Knight, (though  she may be better in this battle as a Battle Master), Shadowheart, and Gael. I had 3 potions of Invisibility and  2 hill giant strength potions. My Ranger had  Long Sword +1 and  Battle Axe +1,  Shadowheart and Gaels weapons did not come into play. I think it is essential  your party  gain suprise. load all the  protections  you  can, and use Bane.
maybe this is off thread but...I read  to much on the  forums from guys who want to make it  harder, more compliant to D&D rules. a case in point is the perpetual whining  about  being able to rest any time  your not in combat. I for one was happy  with  that, So now the game is harder and I scrounge  thru every container looking  for  food or beverage that I have to send to camp  and then  fish them out  to  be able to full  rest. I just wish  you all who want the game harder  because  you have mad gaming skills,  just  hush.  I do ok  but it is a struggle every step of the way
Congratulations Track!  Nice work.  It's not an easy fight but its great when you get it.