Just call the modifier button σκοτειναι τεχναι, we all know it to be true. That frees eukrasia up to be an action in its own right - having a dedicated dot/nuke/aoe/flavour button and σκοτεινη τεχνη version of each - maybe the dot could be an aoe version, the nuke a prohibitively costly but more damaging cast for example?