So I wanted a compatibility patch for VFE Empire, and ended up completely rewriting the original patch to ensure better compatibility with other mods. Guess I'll share it for anyone interested. Lumi, feel free to integrate it to the base mod :)

NOTE - This code REPLACES the original patch ; either create a new patch file and get rid of the old one, or paste this over the original.

<Patch>
<Operation Class="PatchOperationInsert">
<xpath>//Defs/RoyalTitleDef/throneRoomRequirements/li[@Class="RoomRequirement_HasAssignedThroneAnyOf"]/things/li[text()="GrandThrone"]</xpath>
<order>Append</order>
<value>
<li>GrandThroneA</li>
<li>GrandThroneB</li>
<li>GrandThroneC</li>
</value>
</Operation>
<Operation Class="PatchOperationInsert">
<xpath>//Defs/RoyalTitleDef/throneRoomRequirements/li[@Class="RoomRequirement_HasAssignedThroneAnyOf" or @Class="RoomRequirement_ThingAnyOfCount"]/things/li[text()="Throne"]</xpath>
<order>Append</order>
<value>
<li>ThroneA</li>
<li>ThroneB</li>
<li>ThroneC</li>
</value>
</Operation>
<Operation Class="PatchOperationConditional"
MayRequire="OskarPotocki.VFE.Empire">
<xpath>//Defs/RoyalTitleDef/throneRoomRequirements/li[@Class="RoomRequirement_ThingCount"][thingDef="Throne"]</xpath>
<match Class="PatchOperationSequence">
<operations>
<li Class="PatchOperationAttributeSet">
<xpath>//Defs/RoyalTitleDef/throneRoomRequirements/li[@Class="RoomRequirement_ThingCount"][thingDef="Throne"]</xpath>
<attribute>Class</attribute>
<value>RoomRequirement_ThingAnyOfCount</value>
</li>
<li Class="PatchOperationReplace">
<xpath>/Defs/RoyalTitleDef/throneRoomRequirements/li[thingDef="Throne"]/thingDef</xpath>
<value>
<things>
<li>Throne</li>
<li>ThroneA</li>
<li>ThroneB</li>
<li>ThroneC</li>
</things>
</value>
</li>
</operations>
</match>
</Operation>
</Patch>