Here is what you need to know.
The game often runs 2 types of events which make or break your chances of getting the Fusion Hero.
1st type of event is the Shard events.
2nd type of event is the Arena events.
These are the events which most players will classify as Pay Wall events.
The reason why is because it requires a lot of saving & planning to complete them.
What you should do is look at the heroes which are given out from these 2 types of events.
If you don't own any of those heroes, The chances are you will not get the fusion.
I will also like to share with you the way I view the Epics.
I rank the Epics in the following Tier Order:
1 - Basher
2 - Bone Keeper
3 - Necro Hunter
4 - Bushi
The more versatile the hero is the higher they are ranked in my tier list.
Lastly, you asked for advice!
My recommendation is to try your best & think about the positive.
At the start of the fusion, you had 0 chance of ever getting a Bushi.
Now, your telling us you might be 1 week away from getting him!.
This is 1 more hero you have gained on your account which you might have never gained with out this event!
You were already planning to make more 6 star heroes.
Everyone needs more 6 star heroes.
Now you have a chance to get more 6 star heroes + extra rewards + extra heroes.
You were already planning to do dragon runs because you need better gear!
Everyone needs better gear - Everyone farms dragon!
Now you have a chance to get better gear + extra rewards + extra heroes.
People have a tendency to look at situations in a Half Empty - Negative way.
They run around screaming - The game is Pay 2 Win
They get upset because they can't get the new fusion Kantra.
They make themselves unhappy!
If you don't listen to anything else I say, I want you to listen to this.
Get the heroes, you think you can get.
Don't beat yourself up on the heroes, you can't get.
Thousands of players have quit the game because they couldn't get a hero.
They brainwash themselves into thinking they deserve a hero.
And when they don't get it - They end up heart broken or angry
The ones who end up heart broken often lose interest in the game and quit.
The ones who end up angry often end up getting banned for cursing out the moderators & developers.
And that is what will happen to you - If you let these things get under your skin.