Thanks everyone. I do have Scout unlocked, but he's 4* and level 1 (6/65). By the sounds of it, if I decide to farm him, I only need to do so until 6*.
As for what crew they work best in, I usually do Wiggs with Cassian/K2S0 and Lando. It's a real odd combination, I know, but when I started, the synergy between the two R1 characters really appealed to me, and then I learned about Wiggs and their synergies and Lando was brought up for his dual Scoundrel/Rebel tags. I've been running them together ever since because they were the only 7* rebels I had for a long time.
My question is, could I simply plug HRS (either one) into this group and still expect to complete the node or are there any particular squads that they work best in?