Apologies if you would have preferred not to know, but the Elven FCB for Oracle is now 1/6. It's still potentially useful for CMB since every point helps but... yeah.
I would actually suggest looking at a Wizard/Eldrtich Knight or just Wizard/Martial if you can get your DM to approve the use of a certain Wizard Discovery...
You could go Urban Barbarian 1 with a couple Extra Rage for 18/day, so that you can boost attack bonus with rage and furious weapon; then Wizard for a ton of buffing options and Knowledge is Power; then EK to maintain BAB and get even more buffing options. Or, just work a bit of Wizard into a more purely martial build.
Eldritch guardian fighter (with maybe mutagenic warrior on top for flight and extra strength fro attacks/maneuvers).
Eldritch guardian gives you a familiar that shares in your combat feats. Since pretty much all the relevant dirty tricks feats count, this basically doubles your action economy. With it, you could cripple an opponent in a single round
Grab a mauler familiar (probably a fox- they have 16 str at level 3) and you will do fine. They get your full BAB and they get further str bonuses as you level (using their medium form at level 3 as the baseline, they basically get scaling barbarian rage). So it is likely fine. Grab dirty fighting to give further bonuses while flanking to both of you.
Obviously, the 'some skills' bit has to come from advanced weapon training and the usual ways to build up skill points (human and int)
It has the advantage of giving you a pseudo pounce option though. Coordinated charge is a teamwork feat AND a combat feat. It allows you to use an immediate action to charge when an ally with the feat charges. So send your fuzzy friend first, and then move off turn to get next to your target. At that point, you will likely start your next turn next to your enemy, allowing you to immediately full attack.
The familiar is nice but low ac low hp.... It will die if in melee a lot more than a mount.
For HP, a mauler familiar can end up with a lot of hp if you use a mauler, since the owner can take a feat to give it +2 hp per level. That should be enough to get around d8 when you have d10 yourself.
For AC... not sure where that idea is coming from. You can put 0 ACP light armor on anything, and familiars get a scaling +1-+10 bonus to natural armor. So give them proper equipment, and they can do fine.
Ain't a magus better then a wizard and fighter combo?
That depends on a lot of different things. For your dirty trick purposes, a Magus can't take Knowledge is Power to add INT to CMB. Anyhow, even just using one level of Wizard qualifies you for Knowledge is Power.
I still think a 1 level dip of skulking slayer is amazing.
One level of Skulking Slayer is great for the ability to replace a Sneak Attack with a dirty trick, but it does still mean that you need to be able to make a Sneak Attack to do it. Getting Quick Dirty Trick lets you replace any one melee attack per round with a dirty trick, which will then make that Skulking Slayer dip mostly pointless. I'd say Skulking Slayer is only really useful if you're going to actually go mostly Rogue and use the Scout Archetype with it.
Going with a rage-cycle Barbarian - either Barbarian/Oracle for fatigue immunity or Scarred Rager so that 1 round of rage only fatigues you until the start of your next turn - will let you use Strength Surge and Reckless Abandon to make your CMB unstoppable for one Quick Dirty Trick per round. And if you can get the Rage Power Savage Dirty Trick...
So I believe it only takes 1 standard action to remove ALL dirty tricks they have on them.
The familiar is nice but low ac low hp.... It will die if in melee a lot more than a mount.For HP, a mauler familiar can end up with a lot of hp if you use a mauler, since the owner can take a feat to give it +2 hp per level.what feat is that?
Mauler's Endurance. note again- a feat taken by the master, not the familiar. Still, it can be rather worth it, since it does bring it up to melee snuff.
quick dirty trick indeed is a nice one. but. it will allow 1 dirty a round. the idea is to stack many effects so the opponent get rid them out.
It's probably a lot more efficient to focus on blind with entangle as a possible second, and then beat your blinded targets down. But if you really want to stack short conditions like crazy, sure. You can inflict the shaken condition with attacks, as well.
I know your DM said no Slayer, but they also approved the skulker, so you have precedent for checking in for another archetype.
Bounty Hunter slayer fits almost perfectly for what you described.
Good skills, full BAB and d10 HD. Bonuses to dirty tricks and grappling, SA.
Check with your DM, and consider a dip into Order of the Penitent Cavalier for grappling if you want to truss people up.
Edit: Realized skulking slayer is a rogue archetype. This is what I get for skipping sleep.
Look into Maneuver Master monk, possibly with bloodrager or urban rager.
Personal question here, sorry op,
If you've put on 3 dirty tricks on someone how long does it take them to get rid of all three?
Are you sure? Do you have a rule? cause I've heard that only one action is needed to remove any conditions you have. I'll try and find rules for this idea later when I have time to search the rules.