Ilthuryn's page

Let's see what we have got:

Benefit: When you confirm a critical hit against a creature, you can choose to forgo the effect of the critical hit and grant a critical hit to the next ally who hits the creature with a melee attack before the start of your next turn. Your attack only deals normal damage, and the next ally automatically confirms the hit as a critical.

Butterfly's Sting-Link

Benefit: Whenever you and an ally who also has this feat are flanking the same creature, your flanking bonus on attack rolls increases to +4. In addition, whenever you score a critical hit against the flanked creature, it provokes an attack of opportunity from your ally.
Outflank-Link

Critical Hits: Is there a difference between "scoring a critical hit" and "confirming a critical hit"?

No, they mean the same thing. However, the preferred rules language is "confirming a critical hit"...
FAQ-Link

and last but not least:

An attack roll represents your attempt to strike your opponent on your turn in a round. When you make an attack roll, you roll a d20 and add your attack bonus. (Other modifiers may also apply to this roll.) If your result equals or beats the target’s Armor Class, you hit and deal damage.

Attack Roll-Link

Let's summarize:

We have our Attack Roll and and score/confirm a critical hit. Before damage is done we decide to forgo the critical effect (damage multiplied). Now we deal nocrit damage.
This is all part of our attack and counts as one occurrence or event. An AoO can "interrupt" before an attack is resolved not between a hit and damage. (eg: I want to shot my bow in melee - before you know wether you hit or not you get that AoO) Actions in combat-Link
In some occasions it even can stop that attack due death or a failed spell.
In our case we already hit the target and deal damage in one go!

Now we come to the interrupting AoO. Even if we would have another move action or another attack action it is the Ally's turn to resolve his AoO.
Since he is the next ally who hits the creature with a melee attack he get's that critical damage effect! Further he gets yet another critical confirmation(which is very open for discussion wether this would trigger another Outflank AoO)! Remember: The effect of a critical hit is not the critical confirmation, it is the multiplying damage!

No one has mentioned this, but a Mauler familiar can make for the perfect mount for a small creature. The fact it can change size at will means you can use it in any environment.

Because you are mounted, it means that they can easily deliver touch spells.

And for the same reason, they become much tankier having access to the protection of feats like Mounted Combat and Ride By Attack.

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* P.S. Technically, you can ride a flying familiar using this technique. So Shadow Drake mount, Fairy Dragon Mount, Beheaded Mount, etc. The possibilities are endless.

Wait a minute... I have no idea of mounted combat so my question is:

Can you use Flamboyant Arcana: Opportune Parry and Riposte to counter the attacks designated to you "mount"?

I just love the magus!

Sadly I can't recall the item. There is one though which allows your 'deliver spells through familiar'-mechanic that does not require the familiar to be next to the magus.

Found it: Glove of Familiar’s Touch - Price 23,000 gp

I find that familiars who are used offensively in combat tend to get themselves killed pretty quickly. I like using them defensively, such as by delivering a Resist Energy to an ally across the room who's about to get blasted by a lightning bolt.

You might consider Collar, Bloodstone - Price 900 gp as essential if your Familiar is used in battle.

So as a full round action the magus could attack and cast a touch spell that will be delivered by his familiar, but he couldn’t also use spellstrike to attack with that spell himself. I don’t really see a benefit to doing it that way, as you are giving up the extra weapon damage from spellstrike, but it could have some niche uses.

The magus could cast the spell (Shocking Grasp) with metamagic (Intensified Spell or something else). Once/Twice per day, when you need the extra oomph, the familiar archetype would either add Empower Spell or Heighten Spell and later even Maximize Spell.

You would only lose to a lower d6 for the weaponswitch to the natural weapon of the familiar and a lower crit chance. (which is bad)

Sadly I can't recall the item. There is one though which allows your 'deliver spells through familiar'-mechanic that does not require the familiar to be next to the magus.

Regarding the already know usefulness of the Familiar, as mentioned before, I believe with this it is even a more lucrative way to spend one feat for the familiar in total.

You need to read the bit before that.

Quote:

he can designate his familiar as the “toucher”

I am sorry, mate. I don't get it.

I do designate the familiar as the "toucher". The familiar then can deliver the spell just as the master could. Which in that case would be through Spellstrike and Spell Combat. I am not a native speaker so what am I missing :D

You can’t split touches from a single cast with your familiar. When you cast the spell you have to designate who the toucher is for that spell

The beast blade archetype may have some of what you are looking for, but giving up spell recall is probably not worth it.

Why? I can't find the text that says so. When I cast the spell I designate the familiar to deliver. Then the familiar can deliver the touch spell just as the master would.

I agree regarding the beast blade archetype.

I might have an idea but I am not sure whether it works. I invite you to reanimate this ancient post.

Can the magus deliver the Spell Combat/Spellstrike touch spell through his familiar?

To specify: The magus makes his first attack with his weapon (-2 attack) and designates his familiar for the second attack+the touch spell.
So the familiar would attack with his own natural attack (-2 attack) outside his own round and would additionally deliver the magus spell.

Deliver Touch Spells (Su): If the master is 3rd level or higher, a familiar can deliver touch spells for him. If the master and the familiar are in contact at the time the master casts a touch spell, he can designate his familiar as the “toucher.” The familiar can then deliver the touch spell just as the master would. As usual, if the master casts another spell before the touch is delivered, the touch spell dissipates.

IF so I would recommend the Arcane Amplifier Archetype for the familiar.

And here the fun begins:

If you've got 13 Int and Cha you could also take Evolved Familiar for Reach

...Goat is usually the best choice for a flank buddy if you can't get a Mauler Compsognathus.

Well, basically all of the above except regarding the Archetype.

It is also worth having a look at this post!: Touch Spells through Familiar.