Not a bad build. It can certainly be optimized, but it's solid.
A few things to think about.
1. Slotting Performance Shifters in Stamina is something I'd recommend. Not only does the proc have a noticeable effect but 6 slots gives you an AoE positional. The other bonuses it has are good too. I'd slot up Stamina and take slots from True Grit.
2. True Grit is better slotted as a hitpoint boost rather than trying to max out fire/cold resistance. Soft capping already provides good defenses and many fire/cold attacks have a smash/lethal component as well, which is covered by Deflection and Tough. It's not a bad thing to throw one or two Resistance IOs into Deflection.
3. Fireball is a keeper. You will definitely want it. When times when Shield Charge is not up, FSC + Fireball is your bread and butter.
4. Your positionals are at 46.5+%. It means that there is quite of bit of jiggle room in moving slots around. I try to get my builds as close to 45% as possible. Some players recommend going way over 45% to account for when you're debuffed. However, many of the debuffs lower your defense much more than a few percentage points. I'd rather just use the occasional purple to cover it.
5. Not too fond of Obliterations in FSC. FSC eats up a lot of endurance. If you can swap around slotting to put something else in here (like Sciroccos), it will be better for endurance management. However, some builds are tight and it's sometimes tough to get those melee defense bonuses.
I put together a build full of shield builds a while ago. Take a look at it and raid it for ideas. There's quite a few variations in slotting shown: http://boards.cityofheroes.com/showthread.php?t=216944
I've never played a Fire Melee character to high levels, so I wasn't positive on my power selections (Though I have played one up to mid-teens and am pretty damn sure that I don't want Breath of Fire). Anyways, the goal of the build was moderate recharge and soft-capped to the positionals without spending a fortune. Outside the LotGs and healing uniques (I've already got a Miracle unique and am working on merits for the LotGs), I think I've accomplished that. One big thing I'm wondering about is the need for Fireball. I'm thinking that Shield Charge + Fire Sword Circle will be enough AoE, and that I can drop Fire Blast and Fire Ball for Aid Self to patch myself up with. Thoughts on that? Can anyone make some improvements without breaking my piggy bank? Thanks in advance.
The build: