Team2 wins. You have 2boss summon users here versus 1. Jiraya and Minato are students and master when Orochimaru and Tobirama never met in life, so Jiraya and Minato's combos will be more effective. Jiraya will probably summon one giant toad to upgrade his fire power when Orochimaru will summon a snake summon. Minato may summon another(most likely Gamabunta) or just simply try to take advantage of Jiraya's wide range ninjutsu to capitalize on an opponent
The Gk can't be used in battle recklessly. Tobirama would have to be sure to be out of the range as well as his partner before using it.
If Minato is engaging Orochimaru or Tobirama in a close range situation, i wonder how he would cast the jutsu without killing himself or his partner. Not to mention it follows the same rules as explosive tags. The detonation time is enough for a Hiraishin user to get out of the way, especially someone like Minato who could go in and out a 8gated Gai before he can even move an inch. Jiraya can use swamp of the underground to sink the edo fodder and maybe even Tobirama or/and Orochimaru as well. Unless Tobirama left tags out, i don't see how he gets outside the range of the jutsu
The Gk can't be used in battle recklessly. Tobirama would have to be sure to be out of the range as well as his partner before using it.
If Minato is engaging Orochimaru or Tobirama in a close range situation, i wonder how he would cast the jutsu without killing himself or his partner. Not to mention it follows the same rules as explosive tags. The detonation time is enough for a Hiraishin user to get out of the way, especially someone like Minato who could go in and out a 8gated Gai before he can even move an inch. Jiraya can use swamp of the underground to sink the edo fodder and maybe even Tobirama or/and Orochimaru as well. Unless Tobirama left tags out, i don't see how he gets outside the range of the jutsu