SE are always worrying me with their "great ideas"
SE what happens when we are faced with party alliances and mass participation battles of up to 100 players and I presume a similar number of mobs? How well will your targeting work then? Have you honestly thought about this and tested it out? Will I have to admonish you again lol?

Something along the lines of:
"target the mob with the lowest current hp" = /tlchp
"target the mob with the lowest max hp" = /tlmhp
"target the mob with the highest max hp" = /thmhp

Maybe do this for player character hp also, to assist healing.
It may seem too easy button for some stubborn head in the sand types but you try tabbing through 100 targets and you will soon change your minds.