Starting from the first Refugio on the righthand side when you enter. The first/ last 2k is a rocky with snow depending on the time of year. It can be super slick when it's raining. Take a left at the first fork past the abandoned refugio and then make stick to the right. There is a rocky climb to the high camp. Crampons on after the blue refugio for the remainder of the climb. There is a nice flatish 500m or so at about 5460 where the old high camp, campanmento argentino was located. After this, there is a slightly more technical portion- Pala Pequena, which will require an ice axe for safety. You have the option to build a snow anchor and repel or downclimb this piece on the way down (I just downclimbed). Nice smooth track up to Pala Grande, which is like a 45 % grade at the steepest and then you are on the summit! Recommended to hit the summit early as it gets hella windy and snowy in the afternoons.
