There were only ever 2 carbuncles, until /egiglamour. Emerald Carbuncle, that became Garuda Egi and Topaz Carbuncle that became Titan Egi. Both of those Carbuncles used renamed, weaker versions of every ability their Egi counter used. Summon 3 (Ifrit Egi) was Smn exclusive, and thus no Ruby Carbuncle was required. At no point ever has there been a Carbuncle that could heal, because at no point ever has there been an Egi that could heal. Smn has only ever had Physick, Sustain (for the pet), and Drain to heal. The blue Carbuncle, simply named Carbuncle, came with the rework as the default Carbuncle.