This belongs in Army Lists. Anyhoo, lets see. Um, for an Inquisition List, it kind of lacks, well, Inquisition. I would call it a Sisters list
I will assume you mean Inferno Pistol when you say `Melta' on your first Canoness. If so, both of these look fine, though I hope you realise the Frags on the second actually do not do anything. Personally, I find running two Flying Nuns too much of a faith-sink, but others would disagree with me.
Your Battle Sister Squads are too small, and one, lone Rhino is pretty pointless. Similarly, Dominions are terrible options in a footslogger list. Two Rhinos will not survive turn one, leaving both squads to footslog. I would instead fluff-out you footslogging forces. If you have the models, three squads of 16 would be ideal, else two of 16-20 will do. I would also turn the Flamers into Meltaguns, as a footslogger force cannot use Flamers as effectively as a mechanised one, while the extra range on the Meltagun would be far more beneficial. I know little about Grey Knights, so I will not say much, but I was under the impression Incinerators were considered sub-par options for them and people normally left
PAGK with only Storm Bolters. Five lone Storm Troopers will probably not achieve much either. Try to bring their numbers up; you may also like to consider Plasmaguns.
Your Seraphim are illegal: you can only take two special weapons. In your list, I would prefer a single unit of eight with two Hand Flamers over two units of five with Inferno Pistols.
If you can get another Exorcist, do so! Your Retributors are OK, but I doubt you will need a full squad. You may be better off shifting the extra Bolters into your Battle Sister Squads, where they will likely be more valuable. You may also find them difficult to use well with a large footslogger force, as they may struggle to get
LOS. Just something to keep in mind.
My Elites are generally empty, or (in a mechanised list) carry Celestians. Our Elites are pretty poor.