What is Dia/Diara/Diaga/Diaja? I havn't heard of that one. I agree Jewel is pretty pointless, but I think the most useless spells are Confu, Poisona, Remove, Shield, Sleepel and Silence, all from FFVII. I've played through hundreds of times (ok, maybe not hundreds, but definately dozens) and I've never felt the need to use any of them. The status spells in FFVIII are almost as useless, but they come in handy for ST-Def-J early on. On to FFIX now, and the only spells I use regularly are Eiko's Holy and Freya's Dragoon skills. FFX is more of the same, except with the addition of Cure/Cura/Curaga, Flare and Ultima.