epic seed: fortify?

[adecoy95]

im looking at the description for this spell seed, but i cannot for the life of me figure out what the dc modifier for the enhancement bonus is, it has two paragraphs that seem to cover bonuses besides enhancement, but what is the spellcraft dc modifier for increasing the enhancement bonus above 1?

[tyckspoon]

+2 per point beyond the first. Combine with the low cost of the 'extend duration' modifier for highly efficient buffing.

[Douglas]

For the enhancement bonus, the relevant sentence in the Fortify seed description (http://www.d20srd.org/srd/epic/seeds/fortify.htm) is "For each additional +1 bonus, point of energy resistance, or hit point, increase the Spellcraft DC by +2."

For duration increase, see this table (http://www.d20srd.org/srd/epic/developingEpicSpells.htm#tableEpicSpellFactors).