A problem with your build is that neither sha'ir nor Skypledged gets K: Religion as a class skill, so you don't have the max ranks to qualify for Contemplative. Taking Education as your first-level feat and putting off Nymph's Kiss to 3 will cover that. I was thinking of using Apprentice to pick up UMD in the process but I forgot that it stops giving you the class-skill cost for ranks after 5, so you're better off getting K: Religion with Education and using the ranks you save buying it as a class skill to man up and buy UMD crossclass. Also worth bearing in mind is that Skypledged doesn't have Diplomacy as a class skill, so while Skypledged has two more skills/lvl than sha'ir, you're spending one of those as a cross-class tax on keeping up Diplomacy.
You can qualify for the build with just a +1 int bonus, but you won't have any room for skills before 16 other than Diplomacy, Spellcraft, Concentration, and just enough K: Religion and K: Arcana to qualify for Contemplative and Dweomerkeeper respectively. A +2 int bonus loosens up considerable breathing room and gives you the option of synergy bonuses, crossclass UMD, or whatnot, so I highly recommend it.
Feat rundown, in case it's not obvious:
1: Educated (Eberron Campaign Setting)
3: Nymph's Kiss (Book of Exalted Deeds)
6: Your Favorite Metamagic Or Item-Creation Feat
9: Your Favorite Item-Creation Or Metamagic Feat
..and whatever you feel like after that. You can put off the metamagic or item feats until 12 or 15, but there's not a whole lot of reason to since they're pretty useful anyway. Skills are The Obvious Three at every level, K: Arcana and K: Religion until you've got enough for your PrCs, and either synergy bonuses for diplomacy or cross-class UMD once you've got that covered.