On the description, lv44 spells for Conjurer will cast massive attacks after 30 sec but it's actually 40+ secs after cast, and the damage of those spell are only with one attack that only cost 400 to 500 damages? (used to have 4 to 5 attacks after 30 sec)

If these attack is so useless compare to have the same damage like Fire II, why not just change those spells into fire III, waterIII, and etc without 30 sec time counting cast.