If you can find an FAA CFI/CFII who is also an CAA/JAA/EASA examiner qualified to renew/revalidate your MEP then combining the BFR and renewal/revalidation flights would save money.
Undertaking the night qualification would most cheaply done in a SEP. If you have a night qualification and simply want to become current then it would be cheaper to combine this with the BFR and MEP revalidation/renewal.