VO2 115% 2min30s interval - out of saddle

did yesterday Elephants +5… and played with power vs rpm… started grinding… (80rpm) with higher power… and legs got wasted… it made follow efforts harder… reduced power and placed higher rpm…(90)… it worked fine… i have little experiencie…did some in June around 100rpm… but my legs got so much tension… i think i found the idea… about my 2-3min V02 WO, i will try them in slope mode…and see where my power sits… i think my ftp is like 90-95% of V02…so 120% ftp for me is way of… as always…every person is diferrent…we cant use the same WO for everybody…