...? It took me 10 sec to look at irowiki TI page, open both DB links and figure out I would use a Hunting Spear [1] to ignore both Cornus/Naga's defense, as they are both Brutes. Either leave weapon neutral or swap Cursed Water/Fire Converter every Overbrand or two. The needed gears are extremely cheap:
-Any water armor (Swordfish card)
-Any Hunting Spear at all really, Andre card would work
-Rosa Shield + Orc Warrior for Brute reduc
-I'd probably even take a Genie's (Marse) garment over immune, or possibly Coldproof Potion + Immune
When I did this same exact TI a few months back, my gear was not much better than this, and I simply didn't have a problem killing. If this poor, helpless RG in your anecdote really needs any of the gear I mentioned, send them my way. I'm never too poor to help out an RG.
...But if you choose to go Sacrifice/support RG, then that's your problem, lol. Even support RG can level by themselves, it's just not anywhere as efficient, or cheap (autocast gear is generally expensive) as just going battle. Reflect build isn't dead either, it's just not broken anymore, lol. Battle is still the best way to level, IMO... I did a completely solo (no outside buffs) ET run last night, I used Inspiration 5 times and used 4 Tokens to get to Cenia (whom I don't fully attempt without my ideal shield) so honestly... I think we're doing fine.
I don't really mind this stigma that RGs aren't that great (or that lots of people just haven't played one), though. In WoE, it makes the slaughtering that much easier~ <3