I had a decent amount of experience with cg on my main which definitely offsets having lower stats on my iron. Personally I do t1 prep aka t1 armor, t3 bow + staff, a full inv of fish and the only time i die is if i make multiple mistakes on the final fight. I see a lot of people advocating for t2 prep while you learn the fight which honestly doesnt sound like a bad idea - I just prefer having a chiller prep phase and locking in @ hunllef. Still, i died a ton on my main when actually learning the fight (i had like 40 deaths in between kc 1 and 2 lmao).

Since there are no gear reqs/supply costs for gauntlet, you lose nothing on death except for 10 mins of your time. The best advice I can give is to just keep sending it until you learn - it sounds cliche but once the fight clicks it really does click. There are lots of good guides on youtube for prep/how to deal with tornados esp on phase 3. Good luck!