I think it’s going to play out like Garp & Sengoku vs Shiki. Obviously Shiki on his own was weaker than the combined force of Garp and Sengoku, but he wasn’t still impressive enough to cause lasting damage to marineford.
The Giant Warriors will get folded, Loki will try to finish off Ferd but Sanji will step in, which prompts both Luffy and Zoro into action.
Loki is obviously going to be stronger than Zoro and Sanji, but against all 3 he has no chance. He’ll show off his abilities though!!