Spell Versatility: At 1st level, the geomancer learns to blend divine and arcane magic. He still acquires and prepares his spells in the normal manner for his individual spellcasting classes. When he casts them, however, he can mix or match spellcasting parameters from any of his classes to gain the maximum possible advantage for any spell with a spell level equal to or less than his spell versatility score.
Thus, as a 4th-level geomancer, he can cast any of his 3rd-level or lowersorcerer/wizard spells with no chance of arcane spell failure from armor. (The druidic prohibition against metal armor still applies to druid/geomancers, however, since this stricture stems from a spiritual oath rather than a practical limitation.) The geomancer may use his Wisdom modifier to set the save DC for arcane spells, or his Charisma or Intelligence modifier (whichever he would normally use for arcane spells) to set the save DC for divine spells. If a spell requires either an arcane material component or a divine focus, he may use either. A cleric/geomancer who also has levels of wizard, sorcerer, or bard can spontaneously convert any prepared arcane or divine spell (except a domain spell) of an appropriate level into a cure or inflict spell of equal or lower level, though he must be capable of casting the latter as a cleric.
从原文来看，我觉得整个后面一段都是用thus在对该能力的用法进行例举，不该认为是框死该能力的用法
所以我觉得1肯定是可以的，2涉灰，无非法术体系算不算spellcasting parameters
