Walker works, but HP/MP don´t see. After it problem with heal or recharge near too little HP or MP main classis. :-/ I must guard HP/MP and this is not ideal. :-(
3 tyrants? Must be close warsmith for soulshots. :-))
best party for kata/necro/loa/toi is imho knife or tyrant or necro with summoner or summoner with support sws, bd and wc. :)