You’ve already done huge Orthodox/Byzantine/Ottoman-era and world-conquest feats (Basileus, Mare Nostrum, World Conqueror, This is Persia!, Dar al-Islam), so aiming at restoring Byzantine religious prestige (Restore the Pentarchy) and the related Venice/Venezia removal (The Last Crusade) pairs well with a Russia-focused grand project (Triple the Rome) that builds on your experience managing large empires and imperial mechanics.