The 36-year-old Lee-Anne also shot a second sizzling 66 to keep a narrow one shot lead over Aditi. The South african was 12-under-par, while Aditi was 11-under after another day of low scoring at Saadiyat Beach Golf Club.
Pace felt that the light sea breeze complemented the perfect golfing conditions, with sunny skies and temperatures in the low 30s.
Aditi, who remains bogey-free after 36 holes, took advantage of the favourable conditions.
The 19-year-old from Bangalore, who won two titles in her first year as a professional in 2016, will defend her crown at next week's Hero Women's Indian Open.
Also Read
"I feel as though I'm hitting the ball well. I missed a couple of drives left but I generally struck it well and my putting was good."
Lee-Anne, nine-time Ladies European Tour champion, said, "I think there was less wind and it was a favourable wind as well. I started off with three birdies from the 10th hole and made some sliding putts, so I was happy to start like that. I struck the ball nicely and hit the shots where I wanted to hit them."
American Cheyenne Woods stayed in touch with the leaders after making her first professional tournament hole-in-one at the sixth using a 7-iron, from 161 yards.
Disclaimer: No Business Standard Journalist was involved in creation of this content