Psykers in boxes are a good strategy... you don't need the extra fire points on that squad though... just stick with a Rhino.
As for your 'big guns' squads (Inquisitor + WAs + ISs + Jokers) you have more than 5x guns you want to fire so you are probably jumping out of the Chimera to fire... which kind of defeats the point of purchasing a Chimera. I would rather see you put some extra endurace on the squad with Crusaders or extra wounds from Bolter Acolytes.
Also, to be running Coteaz, you have very few and very fragile units on the field. I would be worried about anything that could get into cc with you.
I see what you are saying. I haven't played these yet. Remember I was stating that these are my base part of the army. I will be filling in those gaps with more models at higher pointed army lists. I plan to purchase Storm Ravens and such. I have very few grey knights because I am restarting my play from daemon hunters. I originally had an IG tank army and used DH as allies. Then I used DH with IG inducted. Then switched back when new IG codex came out. I also bought valkyries and could use them as Inquisitor Valks or play IG stormtrooper veteran army with DH allies.
I am using these 750 point army lists as the foundation of 2 army themes. My next list is going for 1000 point builds. I will add 250 points to these lists filling their gaps. Then I will build 1500 point lists, then 1850, and then 2000.
These are the corrections to the army lists I posted b4. The corrections are for forums rules and to the math of the list and to follow some of the great advice from this thread and the forum in general.
I have messed up the math on all the lists in this post. I made mistakes when I changed units and added incorrectly or omitted something. When I finally thought that I had it correct, I realized that I had miss read the cost of servo skulls on the separate units. I could make excuses about being tired and having had the flu this last week, but in the end I screwed up.
so the following are all the list that I previously posted with what I hope to be the last revisions for corrections. I hope they help you fellow grey knights.