From reading your Magelo, great job first of all on getting all those aa's!!
I noted you don't have Secondary Forte. This is simply a must. Get it, and depending on what you have already specialized in, whatever your next that you use the most will go up and help you save some mana in that spell class type.
When I solo, and I get a named, Companion's Aura is simply amazing to click close to the end of the fight when you risk your pet's life the most. You have that, but get the hastened aa's to go with that.. having that aa pop an extra 5 minutes early really helps when you get back another named shortly after or whatever.
Spell Casting Deftness which reduces the cast time of beneficial spells -- you would not think would help much in combat but there are spells that are beneficial which we do cast in combat, depending on your play style. Again your choice but they are cheap! Your pet heal and Tellurian Stance are examples. Again depending on your style.
Get the last 3 ranks of summon companion just for the nice free chance to not only summon your pet quickly to you but to "fade" or clear his agro. Freaking priceless at times. Some use it as a pulling technique as well.
Mystical Shield and Mental Fortitude. One for an added 5% to resist any spell other for a higher chance to prevent getting charmed. That's just me, I'll take anything that can help me avoid/reduce/mitigate anything.
Forceful Rejuvenation. Just simply so in a burn situation you can blast off with your weave of spells and then hit this aa and recast all the spells that are have normally a long reuse timer like your garg right away.
If you solo a lot and find yourself pulling agro from your pet, finishing off those spell casting subtlety aa's to reduce your spell agro is nice. In a burn/named situation finishing off the Silent casting and then getting the hastened silent casting to reduce your timer by 3 min per rank is also very sweet. These are expensive I know but if you solo a lot... they come in handy.
I am always grouped with a necro and I can't remember in a group environment the last time I got summoned over the necro so I have not used silent casting in a while.
Of course it goes without saying that CA/CS and Armor of Wisdom... all great, expensive but great if you again find that you are often getting hit/summoned etc and taking a crap load of damage. Either that of find a necro to group with

Best damage mitigation ever.
You could if you really start to rack them in consider shared health and right after that the extended shared health aa's to increase the range you can be from your pet to be able to actually benefit from that aa. Again I have these aa's and have not used them in for ever but that is simply because of my usual group makeup and play style. Might be something to consider if you find yourself soloing lots and maybe to make more aa's you dont pop that healer merc in say a LOD 30 min burn and find yourself in a bad spot with a bad pull and your health dropping fast before your pet can take agro or you can move away.