2015casa_sf1m2 and 2015okok_f1m1 are the only two matches with a combined score over 400, according to my database.
The Oklahoma Regional finals really were awesome!
I'll make sure my data is up to date and check again in a little while.
Edit: all up to date. Here are the top 25 combined scores from all matches (including qualification):
Code:
match_key red blue combined
2015casa_sf1m2 226 178 404
2015okok_f1m1 207 194 401
2015onwa_qm46 207 192 399
2015onwa_sf1m2 280 112 392
2015onwa_qm20 284 105 389
2015nyro_sf1m6 193 196 389
2015cthar_f1m1 207 174 381
2015cave_f1m2 166 207 373
2015cthar_f1m2 210 156 366
2015casa_f1m2 206 159 365
2015txda_f1m2 149 215 364
2015onwa_sf1m6 226 138 364
2015ilil_f1m1 184 179 363
2015onwa_f1m2 264 98 362
2015utwv_sf1m4 202 157 359
2015nvlv_qf1m8 228 128 356
2015qcmo_f1m3 189 166 355
2015utwv_f1m2 186 168 354
2015onwa_f1m1 228 126 354
2015okok_sf1m6 162 192 354
2015code_sf1m2 214 140 354
2015nvlv_f1m2 232 122 354
2015code_f1m1 202 150 352
2015casa_f1m1 218 132 350
2015nyli_qm53 179 170 349