If you haven’t spent a lot of time grinding for CP, you may wish to employ a lot of SEN in your paradigms. Delta Attack and Mystic Tower will be staples for most of the enemies here, especially for the stronger ones.
This area is one long gauntlet full of enemies just waiting to break you. The first group consists of five Corps Defenders who really are nothing more than cannon fodder. Behind the next barricades wait two Corps Stewards and a Sanctum Archangel. Remove the Archangel first before it casts Bravery on its comrades then kill the others with some simple attacks.
Finally, four Adamantherons will jump the barriers and confront you but other than their ability to cast Haste and Bravery, they’re nothing you haven’t faced before. Towards the end of the Skywalk, a group of soldiers burst in and are determined to take you out. Two Sanctum Seraphs and a Bulwarker make up the group and you should focus fire on the mechanical adversary first because it is the most dangerous. Head on through to the next place when you’re victorious.