Slam vs Modri MOA6 Game 3 Saracen Champs vs Viking?

Can anyone explain to me Modri's decision to blind tech into champion against Slam?

I sit between 1400 and 1500 1v1 so I'd like to think I have a solid understanding of most of the units in the game. Although I don't arena much.

So in this game, Modri is down 0 to 2 in a best of 7. Both players FC which is normal on this map. Modri goes 3 TC and Slam goes siege workshop monastery and takes the relics. Modri makes a defensive siege workshop and trade a few mangonels. On the way up to imp, Modri makes a second barracks and starts teching into champion. They both reach imp at same time and Slam loses his castle because his trebs are doing nothing. He also loses his mangonels which he doesn't upgrade to Modri's Onagers. Slam's castle also has bracer so Modri should know that Viking is switching into arb which is what they normally do at first anyway.

Generic champs are weak against archers. Hussars would be better as both meat shield for onagers or to actually hit the archers. Hussar also do not cost gold which seems like an issue if Modri has 0 relics. Lastly, generic champs are also bad vs Viking champs or Elite Berserk which researches in just 45 seconds.

The only upside to champ I can see is that they hit buildings down a lot faster than Hussars but that relies on the enemy archers and onagers being dead which did happen but banking on a pro player losing these units and never massing doesn't seem a good strategy when down 0-2.