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We need to bring the fight to the slavers. We need to be far more proactive. Those enslaving others must be killed!

And the one whom I trust to actively work towards something resembling my personal values and goals are Tamrin!

First relevant text.
When you voluntarily use one or more actions or feats that apply penalties to attack rolls with your melee weapons.

Inappropriately Sized Weapons: A creature can’t make optimum use of a weapon that isn’t properly sized for it. A cumulative –2 penalty applies on attack rolls for each size category of difference between the size of its intended wielder and the size of its actual wielder. If the creature isn’t proficient with the weapon, a –4 nonproficiency penalty also applies.

Okay so the spell says that it helps with actions or feats that causes penalties to your melee attacks. While the Inappropriate Sized Weapon does indeed give a penalty to your melee attack it is not an action nor a feat.

As such I do not believe that the spirit will aid you if you are using such a weapon. Nor do I believe that it would help with the to hit penalty that you are given by using a broken weapon.

Just buy a Goz Mask instead of using feats/ having to multiclass.

An item you should link to: Padma Blossom

A binding focused Mythos Cultist should consider going Darkfire Adept. Especially with the new prestige class feats that makes you not lose casting progression or CL.

Regarding Shield Brace and PFS.

From Additional Resources + Armor Master's Handbook:
Feats: All feats in this book are legal for play except Mobile Stronghold and Unhindering Shield. Unless otherwise noted, a character must wear armor of the appropriate category (i.e. light, medium, or heavy) to benefit from armor mastery and armor style feats. The Spring- Heeled Style feat also functions when using a full-round action to use the Spring Attack feat.

Another thing you could consider with such a build. Take the Acadamae Graduate feat. Buy yourself a Cord of Stubborn Resolve. And own a wand of Infernal healing.

When you summon creatures using the Summon Monster line you can now do so with a standard action. This will every now and then make you fatigued. But with the belt that fatigue will just turn into 1d6 nonlethal damage because of the belt.

Voila! Standard action summons that works with all the various creatures and not just one or two.

@the Diviner Oh jeez, I have no idea how i messed that up. I probably confused a ton of people. You are absolutely right, planar parchment give the week per level or service time and the +2 to the cha check but no bonus to HD. Thanks for bringing this up.

@Douglas Muir 406 Oh awesome, had no idea that thread existed. the traits and feats will be exceedingly useful, thank you so much!

@DM_DM I am keenly aware of the repercussions of not only Overclocking planar binding but also just practicing diablery in general (My DM has made it hard for me to forget). I have many precautions in mind and a backup character ready, if I am unable to adequately protect myself from my own machinations.

Thanks everyone for the help!

No worries. But for your original question here is what I think is the most you can achieve in terms of raw number of hd on the Greater Planar Binding spell.

26 = 18 base, +2 Caller's Feather, +2 Blackfire Adept, +4 (Augment Calling doubled with Spell Perfection)

Where are you seeing that the Planar Parchment gives extra HD? My copy of Ultimate Intrigue shows no such thing.

From Monster Summoner's Handbook.

Augment Calling. Feat. +2 hd with one type of outsider such as demon, devil ect.

Caller's Feather. Item. +2 hd when calling an outsider. +2 insight bonus on charisma checks to influence the creature called. Crumbles when used.

From Advanced Player's Guide

Spell perfection. Feat. This will double the bonus from Augment Calling.

Personally if I were to create a MT I would go Wizard (Spirit whisperer) 5/ 1 Cleric/ MT.

The Spirit Whisperer allows you to pick a Shaman spirit and at level 5 you get one of the spirits hexes. So then choose the Lore spirit and the Arcane Enlightenment Hex. That gives you divine spells allowing you to qualify for MT.

This means you only lose one level of Wizard progression. The Only downside is that the Spirit whisperer is fairly lackluster otherwise. But for the extra spells gained through the Cleric/MT I consider this to be worth it.

If I was said Lich I would probably find ways of increasing my CL by 4. And then Gate in one of these (or 2 if your players are high on the optimization skala):

Hekatonkheires

Planar bind yourself a couple of Half-Fiend (or celestial) outer dragons (Void is my favorite) and fly there in 3d20 days.

Life bubble and a way of not having to eat might be needed though.

Mnemonic Vestment and a couple of scrolls found with it. Could be something you think would give her more flexibility and such(on the scrolls).

Otherwise the Sorcerer's robe is quite thematic if she has an bloodline where it is usefull.

I think I've found the perfect creature for my needs. Just sharing if anyone is looking for the same type of creature using Planar Binding.

Akhana
This beautiful creature have fast healing, at will cure moderate wounds(or inflict if you prefer that). It can even Cast Raise dead once per day and Restoration three times per day. So pretty good.

I have put myself on "maybe" on the G+ event.
I do not quite know yet if I can make it though :(

These are my thoughts on this.

If the new tricks are to be assumed to be Core assumption, then either:
a: Make a blog/faq or the alike with them.
b: Include them in the next Guide to Pathfinder Society Organized Play
c: Include them in the PRD
d: Do not make them legal options.

Anything else will just make things confusing and/or turn people away since you now more or less need to have Animal Archive if someone has a companion.

the Diviner