o.k., I am greedy

I already have an LNF for this hotel, but it hurts to see so many voucher sites with rates even lower than the LNF I managed to get and I am currently seriously considering just booking 3rd party and foregoing points/nights (benis would still apply).
Renaissance Seoul Sept 5 --> 9
regular rate: 299000 KRW/night
approved LNF: 188000 KRW/night
3rd part sites found as low as: 126000 KRW
anyone able to beat my LNF? JW Marriott would also be an option (don't really care where I stay)