FCL.720.A
(a) [...]
(b) Applicants for the issue of the first type rating for a multi-pilot aeroplane shall be student pilots currently undergoing training on an MPL training course or shall, before starting the type rating training course, comply with the following requirements:
[...]
(2) hold or have held a multi-engine IR(A);
[...]
From an FCL point of view, neither your IR or MEP need to be current. The operator may impose other requirements.