Just for the heck of it I went in with my 107 Yul Ghost Sentinel alt. Equipment and specs:
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Exalted armor and Cloak
Enchanted Exalted Thrower
+2 Noble Circlet Authority
30 day Boss Jewels with +12 Atlas Earring
1 Greater Ruby (30 Day), normal jewels level 3 emerald and opal, level 1 diamond
+4 Greater Kaliel Bracelet
Talisman Longing, Exalted Talisman
Dragon Shirt (not enchanted)
Emperor Cocktail buffs, Santiago Soup, Honey Beer, Shining Dragon Attribute pots, outside Prophecy buff which only lasts 5 minutes
Taurus agathion bracelet for BR
No artifact stones or boosts of any kind
All of my attack archer skills are enchanted to +12 (Impact, Multiple Arrow, Heavy Arrow Rain), except Pinpoint and Quickshot which are +13
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In short, I used a character with a basic setup. Most 105-107 people in game should have these items by now minimally; hopefully, better.
I entered Stage 1 the lowest level, got in range of mobs, which were widely spaced out across the room, played my favorite XP song ..the Ghetto Boys "My Mind Is Playing Tricks on Me", clicked on my macro, and watched the outcome.
The room starts off with normal mobs. When you kill them, they have a chance to turn into the Void or Doppler mobs. Both the normal mobs and Void/Doppler are hard to kill with the above equipment. They also hit you pretty hard.
My first and only thought was that there was no way a support class with basic gear can do Rim. They won't be able to kill one of the normal mobs, let alone the Void/Doppler that appear after you kill that mob.
When the 10 minutes had expired, I scored ~2500, which was enough to earn me an award box. No strategy, no top gear, but I still got a chance to win a prize.
Having said that, I am sober to the reality that Stage 2 and Stage 3 where the really good prizes are can't be done by my 107 Yul alt in basic Exalted gear.