If we go by the Homestuck standard, where plot relevance and direct involvement with the main story equals power level, we can safely say Colsla upscales Yitris, Dmarko, Oxnard and Oficus. We can extend this to Korpus, since he beat his lusus (offscreen), which puts him on the same level as Oxnard. I'll also assume Renity scales lower than Oficus.
However, Colsla seems to worship Mallum as a religious figure, which means Mallum actually scales higher.
And as we know, Ellith solos Mallum's spine.
This was Ellith upscaling all along. Tism strenght is unmatched.

Will she be happy now that Mallum is there?

Do you think Ellith gets sad because she never gets to suck on Renity or Mallum's chest?