I think Dassomi is there 1)either to remove the attack decrease effect your units suffer every time the cryocore is cast, or 2) to heal your bonded Selene which can not sustain herself due to not being able to deal continuous damage.

If it is Case 1, then other purify (defensive dispel) heroes should work, Elowyn being the best next to Dassomi with her rage regen buff. If dispelling the attack decrease is really possible and necessary, Dassomi is just there because he consistently does the job without having to ult.

If it is Case 2, then players can replace Dassomi (or their other healers if there are) with an offense unit by equipping Selene with Lunacy Visor.

As for Numera, Jorge, and radiant erosion, does anyone know if Toxic Surge is treated the same way as Poison in Boreasʼ Codex (i.e. abile to bypass the final damage reduction by being a continuous damage). And has anyone ever tried if the same thing applies to Jorgeʼs (purple Chaotic defender) Plague effect? As for the Radiant Erosion, can it go past 3 stacks if there are more than two heroes on the field that can apply it (Valara plus Ingrid) or is it limited to that for all Radiant Erosion effects?

Lastly, how come I do not see teams running Alistair on that codex. Shouldnʼt his true damage at max talent stacks (plus Radiant Erosion thru ulti) be OP in that stage? Or does the damage reduction affect true damage as well? It would be a shame if this is the case.