Latest Patch situation for Oracle EPM release 184.108.40.206
This release was only made available in the last week of Jan 2015 but already there are PSU available as below and recommended in KB Article 1400559.1.
Smartview version 220.127.116.11.400 is currently recommended for use with all versions back to 18.104.22.168.500+
KB Article 1932533.1 indicates that BI+ Production Reporting (i.e. Interactive Reporting, the old Brio product) will not be in any future EPM release beyond 22.214.171.124
KB Article 1932177.1 indicates that WA (Web Analysis) will not be in future EPM releases beyond 11.1.2.x (unclear if this means 126.96.36.199, but intent is clear).