Yeah... that doesn't actually answer anything.
You've taken everything I've done, and then gone off the deep end with even greater optimization everywhere. I pick a strong core race... you pick argueably the strongest setting specific rogue race available. I make a strong version of a somewhat generic Factotum type, you go for a specific type of Rogue that never sees play. I get a reasonable thematic mount, you go for a Warbeast Fleshraker. I occasionally use the MIC combining rules to combine existing magic items and an item familiar that gives me skill ranks, you go for a custom item version of an item familiar that spams grease in addition to the skill ranks. Heck, I use an item familiar to get a few more skill ranks and be less dependant on found gear, you make a character who can't function without it.
Now, that's extreme optimization, well above anything I'd even consider. And I know that perhaps some people play that way (I don't, but that's fine). But considering you've been complaining about even things like combining Feycraft and Dwarvencraft, going so far off the deep end of optimization seems strange to say the least.
But none of that answers the questions... can your character even carry the backpack and his armour without going over wieght limit? See, one of the reasons I call the potion thrower Rogue something that no one plays is because it's only a thought excercise... in actual play it doesn't work. In this case, you can't carry your gear. Notice it's a move action to draw anything out of your Haversack, so you can't keep all your potions in it if you plan to use any in combat. You'll have to keep a few out for throwing... and each one is 1 pound. Also, where are your Item Familiar stored ranks actually placed, considering you can only invest 3 points of any given skill, and you haven't mentioned which powers it uses?
JaronK