One thing is starting to piss me off in this game, and that is repeatedly failing to cast simple spells. 2/3 times spells like Armor and Strength fail, even when my bard is playing, and I can only dream of casting the Mass versions of these spells.
Meanwhile Frogman Shamans spam spells like they were Elminster, hardly ever failing despite me casting Light Magic (using an item, since I don't really know the spell yet) three rounds in a row.
I met a whole party of Frogman Shamans, supported by Giant Frogs and Poisonous Frogs in a cave and had to give up.
Just to make these enemies extra annoying they Teleport at random, making it hard to keep a line, and using area spells like Web and Ice is not very effective against them.
Any suggestions on tactics against these annoyances? And no, casting powerful spells is not the answer when my spell casters constantly fail despite having around 100 (Passable to Competent) magic skills.