What Strat is Better? (in General)

10m HP + GA with RBF or 10m HP + CoC with base GA (RoS boosted), with either AMF or DM trained.

C) Facepalm

IMO:
10m + GA with RBF and with big AC armors MS, AoAC, CMLS, HoD, tulks + skill armor proficiency

a tattoo with wall equips isn't very good. With the AC nerf and the lack of an AC and SC it's not worth it.

Neither of your strats are really that effective, but make note that your strongest advantage is your exp concentration. I'll say the RoBF + HP + GA would do mediocre, make sure you train some AMF so decay doesn't devour you.

I can't see you pulling off the giant CoC mage. Not even I have enough exp to pull that off effectively.

So OK, I tried to think of the best way to use an RoBF. Granted, I am not the end all expert on strat AND there is new stuff I do not know how to use effectively. That said, the strat I settled on has done very well. I think you need at at least two minions to really leverage the RoBF, but I found three to be optimal. Yes I have a lot of gear (thank you lord for camping while I had it) so I had an edge you might not have access to. That said try something like this.

Min 1 - Unarmed Combat guy - HP ST DX and UC. The only way to work this is to leverage those inexpensive, well they used to be at least, UC gears, a Gi, HG's, DB's etc.

Min 2 HP only and slap on a massive RoBF

Min 3 HP and PL - and Magic resisting gear

Anyone attacking from the front has to hit all the UC evasion and such. If they do hit PL absorbs it anyway. Anyone attacking from the rear hits the back guy who has all the magic resisting gear.

Anyone attack with fire is in REAL trouble. Anyone who cannot hit the UC guy in melee regularly will be crushed by the RoBF eventually. The longer the fight last the better chance your RoBF will win it for you, so design your front and back minions to last as long as possible so the never miss no matter what their DX is RoBF damage will kill them in the long run.

I am sure there are better strats than mine with all the gear and the three minions, I mean, this was my first try ever with RoBF and it has done well without modification. However, I was hoping more to to implant the concept, make the RoBF wearer last as long as possible and your chances to win the fight go up greatly.

Oh yah PS I forgot two little nuggets. The UC in ranged or melee does not do much damage. This is intentional so GA wont kill him to quick but he can still kill no HP having non combatant with some skill AND you need a small, not large at all AMF to mitigate base Decay. Again all designed to make the fight go long and let the RoBF do its thing.