Juggernaut Boss Tips
The Kasuar/42Z (reverse jointed legs), besides just being a lot of fun to use, is EXTREMELY good at strafing around the Juggernaut. Couple that with the Alula/21E thrusters you get from the training missions and the Ling-Ta Generator, and it makes this fight a cake walk.
Alternatively, you can go with the VP-20S generator and sacrifice energy recharge for a slightly lower weight and MUCH higher EN load (letting you stick on some better parts).
The BML-G1 vertical missile launcher is also GREAT here, as it bypasses a lot of the Juggernaut’s front armor.