[Edit] Munchkin-Size Me
Eldritch Glaive + Divine Power + Righteous Might is an incredible combination.
Combatch Reflexes might be worth taking if you enlarge yourself.
If your DM will gloss over the Chaotic/Evil diety requirement of Eldrith Disciple and overlook the domain/diety relationship, then take the Planning Domain(grants Extend Spell) & Undeath Domain (grants Extra Turning).
Create a custom magic item that grants Extra Turning (approx cost is 10,000gp).
Research a custom spell that has a fixed range or a range of personal. Base it off a spell that has a variable range. For example Shield of Faith reworked to be personal instead of creature touched.
Buy a Monk's Belt. Can't use a shield, but your Luminous Armor technicaly isn't armor, just provides an armor bonus just like bracers of armor.
Buy Strongarm Bracers. RAW doesn't state the size of the eldritch glaive, just that it is a weapon-like reach weapon that resembles a glaive. If you are large it likely creates a large glaive. If you use strongarm bracers, why not create a huge glaive. In fact why not a Colossal glaive and take the -4 tohit.
Consider replacing maximize/empower spell like ablity feats with Extra Turning to get 4 more presisted spells.
[Edit] Side Notes [edit] Limitations
The Practiced Invoker feat is a homebrew feat. Grants improved Eldritch Blast/Glaive damage in addition to caster level bonus. Not overly powered since few invocations have reliance on CL. If DM won't allow then replace with Extra Turning (or another feat).
Attacking adjacent squares with Eldritch Glaive isn't possible. You have two solutions. Take the Shorten Grip feat, or use your Eldritch Blast instead. Both need to be cast defensively if you are threatened.
Your HP are a bit low to be in melee. Keeping your AC and saves high will help. The Lesser Vigor, mass also helps. Flying helps alot. Just be careful about getting in too deep, stay at the edge of the battle. If you start getting hit hard, just cure yourslef and hope your party can take care of the problem. Play smart and you should be fine.
You can only benefit from one Nightstick and one Holy Requilary Symbol. You can use both at the same time, but can't benefit from more that one of each. If you read the FAQ you will note that turns are counted by how many you have used in a day, not how many are left.
[Edit] dm Counters
This build is heavy in persistent 24+ hour spells. Foes with dispel magic and antimagic are a good counter. In fact eldritch blast doesn't even work in an antimagic field.
Creatures with spell resistance or immune to magic are a problem for this build at levels 1-15. At level 16 Vitriolic Blast overcomes spell resistance. Gauntlets of Eldritch Energy help, but are only usable three times per day.
Swarms are a problem. Taking a Eldritch Cone at level 18 is an obvious fix, but rather late in the character build.
Indoor adventures that limit the flight benefits.
Grappling pretty much negates eldritch blast, and any other somantic spell or spell-like effect. Most builds can get away, but at least a grapple will slow them down a bit.