@Fox The core of the problem as many others have already pointed out, is that you can easily cheat yourself into getting the race monster by running a low level secondary team with a 'baby account'. Before I suggest any possible solutions, I will show you how prevalent this habit is by showing you a couple of race logs of a top 100 team:
During this race, no team even tried to stick with their main team and all 20 teams went to their race teams!
Now here, the team must have realised just in time that all other teams have gone to their race teams and just idled to get past the 14 laps.
Keep in mind that these are race logs of a top 100 team!!! They recently annihilated us and we are currently ranked 38th which leads me to another problem that the race is causing - skewing the ranking in favour of the cheaters as they obviously don't win wars with their main team while racing elsewhere.
We had a long-term player jump during the current race and he messaged us how stress free it is in a race team, you just idle to lap 14 without any competition and pocket the race monster. So I replied that he must feel a great sense of achievement and why he isn't looking up the monster hack where he can replace skills with zero stamina special moves. He'll then win every battle, stress free! Oh hang on a second, that behaviour gets you banned right?
Now to a possible solution:
The problem is that the race laps are way too hard for low level teams. How can craft runes if your rune temple is still locked. How can you even attempt breeding multiple epics if your breeding guardian isn't built or has no stars?
I propose a league system for the race. Low level teams will only get a Lvl 100 race monster as first prize, but completing nodes will a lot easier. Base leagues on total MP of team. Gradually increase rewards and difficulty until you get the Lvl 115 monster in the top league.
This should solve most if not all the problems as there is no point jumping into your race team if you only get a Lvl 100 race monster out of it!
I sincerely hope that you will give this suggestion some serious consideration!