Depends on where youre at in the game. Early accounts are going to struggle with fusions. Older accounts that manage resources around monthly fusions have no problem doing them without spending

You know the events going on are so that you don't have to pull the fusion champs from shards, right?

Ummm really? I still have to play the arena to get 60 shards for Khafru the Deathkeeper.. but i need 100 for him. Then i need to do that 3 more times.. THEN I HAVE TO ASCEND each Khafru to a rating of 50 with 5 ascended stars to get Armanz in 3 days time. Did i miss anything? 

hate to tell you but if you still havnt fused a single khafru you missed 90% of the events and will not complete the fusion. 

I think most people finished the fusion a coupe days ago.

Sounds like you are a new(ish) player and haven't quite figured out how fusions work.  Most players wait at least a few months before attempting a fusion because they are next to impossible for early-game accounts unless you already know what you are doing.

Save your resources for the next fusion, or the one after that....     

First off, not everyone is supposed to get the champion. Second, if you are not someone who spends on the game, like myself, you have to plan and save your resources. Once you hit a point in the game and you pick your fusions that you participate in wisely, doing a fusion isn't that difficult. Parts of it are a time investment but the materials needed to get that are easy.

I will say that if you are not able to do NM Clan Boss or UNM you are going to struggle to get the necessary materials. If you are not that should be your #1 focus.