If you only plan to have an rg all you need is Aegis and if not the other 3 house crafted are fine. For a long time, I did not have an rg as on my zwei or leg if I had 3 to sometimes even 4 housed crafted shields on me I would be fine on hard and even most of rag runs.
That was years ago so idk if it's changed much other than Aegis getting even better... Point being to shield in this game it takes not much in gear and even less in skill.
Edit an afk timer was added that became pointless by the new 15 waves vs 20... I would maybe consider looking into the afk timer as it may need to be shortened by a minute or so unless you make some sort of a rg timer or whatever...
That was years ago so idk if it's changed much other than Aegis getting even better... Point being to shield in this game it takes not much in gear and even less in skill.
Edit an afk timer was added that became pointless by the new 15 waves vs 20... I would maybe consider looking into the afk timer as it may need to be shortened by a minute or so unless you make some sort of a rg timer or whatever...