Saving Throws

[halfgiant]

In the Daerma Campaign for multi-class characters which i think we mostly are (maybe not the imaginary thief), how are we suppose to calculate saving throws in our version of multiclassing?

Do we add the bonuses up across classes? or do we just use the highest base saving throw?

So for example: 10th level Wizard / 10th level Cleric

10th level Wizard is (Fort, Reflex, Will): +3, +3, +7
10th level Cleric is (Fort, Reflex, Will): +7, +3, +7

Calculation:
Saving Throw = Base Save Bonus (Class) + Ability Modifier + Other Bonuses

So to calculate ‘Base Save Bonus’ for the character you would add both classes and have +10, +6, +14.

Is that how everyone has been doing this? Is there a different provision for prestige, or operates on same principal?