The classes listed here are easy to enter, even if the combo itself costs more feats than you'd like.
If you don't mind changing some of your choices to include the Spell Focus [illusion], Earth Sense, Heighten Spell and Earth Spell feats...
Three levels of Shadowcraft Mage (with the cabal adaptation to alter the racial entry requirement) and two levels of Wyrm Wizard can net you "Shadow Miracles" if the second level of Wyrm Wizard (which doesn't advance your spellcasting) is taken after you're capable of casting 9th level arcane spells.
Arcane Disciple wouldn't work for you, given that there aren't any LN deities with the luck, hope or zeal domain that I know of offhand.
Paragnostic Apostle is a nice filler for looking to improve the CL of spells that appear on selected domains with the Divine Understanding feature (i.e. selecting the illusion and/or gnome domain to boost the CL of Silent Image) or to improve spell penetration and dispelling checks via the Penetrating Insight feature. Plus, membership in the Paragnostic Assembly is a good way to boost spellcraft checks and fuel Knowledge Devotion with Skill Mastery of all Knowledge skills.
I would also suggest a Cloistered Cleric dip (worshiping ideals and not a diety) to obtain Extend Spell again (planning domain) and Knowledge Devotion again (trade away knowledge domain).... so you can ask your DM to let you get other feats instead. For this level, I would also suggest taking the cleric class flaw Divine Gestures to gain an extra feat. That flaw makes it so your divine spells incur spell failure as if they were arcane.
