The Death Jester, Shadowseer, Solitaire, and Troupe Master each got a new rule called "Pivotal Role" in 9e.

They each allow a unit to replace one of their rules with a new one out of 3 choices. We will add that choice as well, after converting the rules to work for Apocalypse

Death Jester

The Death Jester's "Death is Not Enough" rule appears to be modeled as "Terror Troops" in Apocalypse. It can now be replaced with one of the following:

Ability	9e effect	Apoc effect	Comments
Harvester of Torment	Hits vs 6 or more models score 3 hits	Hits vs 6 or more models get to reroll wounds	While we couldn't find another weapon that cared about number of models, there is nothing preventing a rule like this from working. Might lay the groundwork for adding blast later. However, scoring more hits does not appear to be a thing in Apocalypse - things like Tesla Weapons for Necrons don't even appear to benefit from being tesla, which is strange - a Tesla Carbine has no advantage over a normal Boltgun
The Jest Inescapable	Add 12" to Weapon range, mortals on 6s to wound, ignore cover	Add 12" to weapon range, ignore obscured penalty	Mortals on 6s to wound is not a thing in Apocalypse
Humbling Cruelty	Hits reduce movement and turn off overwatch	Hits reduce movement	No Overwatch in 9e

Shadowseer

The Shadowseer's "Shield From Harm" ability can now be replaced with one of the following:

Ability	9e effect	Apoc effect	Comments
Veil of Illusion	friendly models within 6" count as being 6" further away for ranged attacks	friendly models within 6" count as being 6" further away for ranged attacks	This is really cool, and even though it breaks our goal of "reduce number of things to keep track of" we are keeping it
Gloomwake	Friendly units within 6" get cover	Friendly units within 6" are obscured	cover == obscured in Apoc
Agent of Bedlam	Enemy units within 6" subtract 1 from their attacks	Enemy units within 6" must reroll successful hits	# of attacks is so different in Apoc we decided to make up something unique and different for this one, since Shield from Harm already subtracts from wound rolls

Solitaire

The Solitaire's "Blitz" ability appears to be baked into it's Movement and Attack characteristics, and the Solitaire Weapons' SAP and SAT. Seriously, the solitaire statline is absurd. Rather than try to unwind all that, we decided to make the Pivotal Role abilities optional, and to cost an additional 1 PL if chosen

Ability	9e effect	Apoc effect	Comments
Shocking Emergence	Deep strike, additional dice and discard when charging after deepstriking	Deepstrike, extra movement the turn it deepstruck	no comment
Chromatic Rush	guaranteed 6" to advance, piles in/consolidates and additional 3"	Additional movement, pile in additional 3"	In general, the "guaranteed 6" when advancing" works out to an additional 1" on the unit's base move, see shining spears for reference
Unnatural Acrobatics	-1 to hit this model	-1 to hit this model	no comment

Troupe Master

The Troupe Master's "Choreographer of War" ability can now be replaced with one of the following:

Ability	9e effect	Apoc effect	Comments
Prince of Light	Friendlies within 6" reroll charges	+1 to move within 6"	no comment
Darkness' Bite	2 Mortals after fighting	Extra blast after fighting	Used haywire mine as a template
Twilight's Grasp	Wounds not-monster/vehicles on 2+	Wounds light on 3+	Used poison weapons for drukhari for comparison