Trying to create a new creature need help

[wdmartin]

Your options are:

1) Increase the relevant ability score (Constitution for Fort, Dexterity for Reflex, Wisdom for Will).

2) Take a relevant feat (Great Fortitude, Lightning Reflexes, Iron Will).

3) Give your monster an arbitrary boost to one or more save type as a racial bonus. You can implement that either with the editor, or by just applying an adjustment to the creature.

Note that increasing the ability scores can be something of a balancing act. Pumping up the Constitution will also give the monster extra hit points. Giving it more Dexterity will increase its initiative, AC and quite a few skills. Increasing its Wisdom will give it higher Perception, and increase its spellcasting ability if it happens to cast spells based on Wisdom like a cleric does.