Just pulled out my conf file. Here is the complete list - 12 connections and running fine. Try adding all of these.
Its is a large chain so will take a while if your going from scratch. i would recommend the bootstrap.

listen=1
addnode=81.17.16.228
addnode=184.154.4.43
addnode=64.58.130.180
addnode=193.242.159.253
addnode=79.17.72.110
addnode=174.139.194.205
addnode=24.57.75.67
addnode=24.86.14.251
addnode=93.152.184.244
addnode=70.180.167.36
addnode=61.182.139.73
addnode=59.40.165.21
addnode=58.254.168.36
addnode=101.226.247.43
addnode=71.72.180.213
addnode=118.208.208.86
addnode=94.123.203.117
addnode=71.56.243.136
addnode=203.208.83.100
addnode=116.23.14.113
addnode=101.224.84.242
addnode=210.49.207.71
addnode=124.169.110.219
addnode=46.208.243.18
addnode=89.173.16.49
addnode=93.91.51.111
addnode=92.108.233.53
addnode=120.144.132.169
addnode=90.148.79.252
addnode=113.167.83.32
addnode=178.217.59.2
addnode=67.191.52.11
addnode=220.168.105.18
addnode=67.191.189.132
addnode=67.180.104.110
addnode=99.250.206.168
addnode=98.255.23.128
addnode=112.66.78.2
addnode=68.146.84.237
addnode=83.53.153.73
addnode=182.239.144.188
addnode=72.191.117.227
addnode=114.141.14.14
addnode=94.254.37.103
addnode=86.125.214.133
addnode=9.207.10.24
addnode=66.18.67.23
addnode=46.4.95.176
addnode=107.170.22.138
addnode=180.141.137.44
addnode=212.247.109.253
addnode=111.126.201.199
addnode=115.28.162.160
addnode=183.100.94.203
addnode=79.111.216.239
addnode=122.178.204.154
addnode=31.7.27.94
addnode=78.30.234.229
addnode=193.77.151.95
addnode=62.194.23.49
addnode=88.213.221.126
addnode=37.59.14.189
addnode=199.200.120.163
addnode=162.243.35.172
addnode=107.170.26.155
addnode=162.243.222.26

Hope that works, its great to see life back in the mint