I've become interested in Salient Divine Abilities. This answer details some of the ways in which they can become absurdly imbalanced (even in comparison to an Epic level party). However, when I look through the prerequisites for the most absurd of these abilities (e.g. those that can easily affect multiple targets, allow no saves, or can rewrite reality), I find that they require very high levels or ability scores that I believe will be very hard for most PCs to achieve at a point where a normal 3.5e game would still be considered balanced (e.g. short of breaking the game, how would you get Cha 29 at level 10?). So for the sake of this question I will pick level 15 as an arbitrary point where we can assert that 3.5e is still a game that we need to worry about destroying the balance of.
This gives me my question: Prior to level 15, is there any way to give players access to Salient Divine Abilities that would not destroy game balance? An answer will ideally either give an example of a game-breaking Salient Divine Ability that is easy to access for most PCs or will, by means of several examples, show that the power of the Salient Divine Abilities that PCs can access do not greatly exceed the power of what they can realistically already access at their level. Finally, we will assume that the DM does not ban any particular abilities and that the players can gain any Salient Divine Ability that they qualify for.