Tie-breaker is map differential not H2h, remember in 2023 EG qualfiied over 100T despite 100T winning H2H, and riot hasn't announced any changes to this structure. So if 100T beat KRU they are the #1 seed.
If 100t win, Sen are first seed ( assuming they beat 2g) since they won the h2h. If kru wins , they are 1st seed. So there's no way for 100t to be 1st seed