Its vers frustrating not only to do something every 30 mins but also keep en eye of the charges left od eternal spears while other vocation tmdo t have this issue.
Also they waste mana which could be use to make supplies. Why only rps habe this training drawbacks?
Make a training spear a permanent weapon that you can just buy from npc .
And leavee the spell just for server start because it will be cheaper to use than buying the npc training spear( i suggest price between 10-20).