From publisher blurb:
The Multiclasser's Manual is back with a second, even larger volume! Included in this volume are 16 archetypes, including 7 brand-new ones and over 40 synergy feat chains. All told, this volume incorporates and updates the existing content from Thematic Toolkit: Arcane Avenger, Thematic Toolkit: Cultist, Thematic Toolkit: Scrapper, and Thematic Toolkit: Judge, Jury, and Executioner with the following new archetypes:
For the bard class, the Bone Dancer, a bard that has embraced necromancy along with song and can truly dance with the dead.
The Bringer of Bedlam is a berserker that rages with magical chaos, warping the world around them.
The Dragon Priest archetype for the cleric class represents the divine forces of dragonkind among their mortal followers.
Espers can now take the Observer archetype that leans into supernaturally keen senses.
For those playing a scholar who want something a little less academically-focused, the Street Student gives you a means of depicting those who are both book smart and street smart.
The Embedded is a wielder who has implanted themself with a nature-oriented artifact that can take a variety of different forms.
Hailing from the airy stone peaks, the Mountain Witch archetype for the witch class incorporates the nature of the mountain into their magic.
The following multiclass combinations are also supported with synergy feat chains:
Existing:
Adept/fighter
Berserker/herald
Berserker/warlock
Cleric/warlock
Herald/sorcerer
Herald/warlock
New:
Adept/berserker
Adept/druid
Adept/herald
Adept/marshal
Artificer/berserker
Artificer/fighter
Artificer/ranger
Bard/cleric
Bard/fighter
Bard/rogue
Bard/wielder
Berserker/cleric
Bloodblade/druid
Bloodblade/herald
Bloodblade/warlock
Cleric/elementalist
Druid/herald
Druid/rogue
Druid/wielder
Druid/wizard
Elementalist/herald
Elementalist/warlock
Esper/fighter
Esper/herald
Esper/rogue
Esper/wizard
Fighter/sorcerer
Fighter/warlock
Herald/rogue (new, fully generic feat chain, not a reprint of the Truth Seeker chain from MoAR)
Rogue/scholar
Rogue/witch
Warlock/wizard
Wielder/wizard
Bard/ranger/rogue
Round it out with some new spells, a profession feat for the new bloodblade class (introduced in Bloody Heretics from Plant Witch Press) and various other odds and ends and you've got another indispensable character creation resource from Purple Martin Games.