I managed to 1-stone Keeper of Flame, I would've managed it too if I hadn't been screwed over by the sheer lack of both fire and light orbs (I was running FFanatic's TAMADRAPurin).
Though the boss went down surprisingly smoothly, I guess he simply couldn't take the x7 multiplier + 8 matched +fire orbs + the extra 20% from Tyrannos's ability :V
It wasn't an instant kill, but it was close enough that another volley killed it anyway.
Also, got to rank 40, I already have the necessary materials to EVO both my Samurai Goblin and my Red Dragon, I did some quick math and I should be able to have my Rowdy Goblin at rank 43 and the Volcano Dragon at Rank 50, the former isn't too far off, the latter is gonna take a while but eh. Also, my Tyrannos is almost outscaling my Horus in terms of damage, and he is certainly a whole lot easier to level up than Horus. My current objective is to just grind Fire-Whorshipping snake until my Ecchi, Tyrannos and Horus are at level 30, possibly my Rowdy Samurai too. I should be good to go then even though the Red Dragon is still gonna do pitiful damage, but nothing I can do to rectify that until Rank 50. :/
Once I'm done I'm probably gonna start to farm rubylits (or w/elits) to cheese my way through the Friday Dungeon and mount an army of Dublits for my Rainbow Horus team, then finally get through the Sea Cave Mercury since my MonoRed team is having way too much trouble with it.