Do not use QFE if your aircraft is not pin-programmed for it. Do not switch of EGPWS, it is your life-saver in IMC.
Use QNH below TL: PF will set cleared ALT according to JEPP (or other) Approach plate table (on JEPP the NON-bracketed Altitudes) and your PNF will crosscheck for correctness.
You have never been in UUWW. What will your PNF crosscheck on "decent height 400 meters, cleared ILS"? You will not find this height converted to an altitude on a Jepp approach plate. Converting a height in meters to an altitute in feet shortly before an 90° ILS intercept is lots of fun...