It is simple:
landfall at Calais from LYD, BSN, CLM, LFPL - keeps you well clear of C d G and all very painless. You should aslo get a mil radar service from Tille I think it is if you want it.
A lot closer and cheaper than Pointoise.
PS not above 1,500 feet I think from BSN which is fine.
PPS give Lognes a call and they will arrange customs I think 24 hours notice or of course clear at L2K but dont forget you now need to email details as per NOTAM.