This is why I try to get people to discuss their characters as a group and work together to create a party when I have a group ready to go, and not a gaggle of disorganized applicants. People try making an interesting, or super powerful character, without the consideration of how that will fit into a group. Whether it assists the group in a meaningful fashion, or if it is just a shiny character that runs against the grain as it were.
It's also why I have turned to gestalt games. It allows my players to do just this, create a dual progression support concept without needing to dig through the bowels of the internet looking for ways to break the game system in order to be viable. Allowing a player to fold cleric into their heavily armored fighter for a super tank that sustains itself, and the rogue to meld with wizard in order to truly be a stealthy menace, etc, etc.
In a standard game, it's better to just ask yourself "What is my role, and what does the party need?", then "Will I enjoy playing such a character?" If yes, build that, as it enhances everyone's fun and enjoyment. You want to support the other characters in the group, super. Decide between Divine and Arcane. Personally, I would go Focused Specialist Transmuter and just dump buffs on the party for days for this type of build for Arcane, move into Warweaver to get quick multiple buffs down rapidly. Ditch Evo, Necro and ugh, maybe Enchantment, to allow for the G. Invisibility at the cost of Rage and Heroism? *shrug*
Your concept belongs in a game like my gestalt tactic games, where each player takes on a role and fits into the party/machine as a cog. Spell slinging support of awesome to empower the rest of the group. You are trying to support a ninja, monk, and DFA though. No full BAB characters, so you have to use stealth to get the job done. If everything goes to hell, someone with nuke and control capabilities would be handy. Then again, a cleric with Freedom of Movement and Heal would be as well. Your party needs a 5th, or better characters for a myriad of situations. >.<