Choosing your monster in Idle Heroes is really crucial as it will determine your success in the game. 

Phoenix

Phoenix is considered to be the best starting monster. This is because Phoenix is a hybrid combination of Wolf and Deer. It can deal huge amount of damage to the opponent. On top of that it deals burning damage over time and at the same time, it also has the ability to heal your heroes. Hence, with all of these features and skills of Phoenix, it is considered as the best starting monster in the game. 

Wolf

But when it comes to PvE monsters, Wolf monster is considered to be the strongest among the rest. It doenst have a combination of other monsters, hence, it really excels in sthe category of all in PvE monster. Yes, wolf imposes decent amount of damage to the opponent but it doenst have the ability to heal your heroes as what Phoenix does. 

Deer

Now, if you are looking for a monster that provides healing power to all your other heroes, Deer is the right one for you. As a starting monster, it can heal 20% of the total HP of your heroes. Thus, it can be a great advantage during the early to mid game. However, Deer tends to be great only during early mid game. This is why it is advisable to have Phoenix at all time. 

Dragon

Another monster that you should consider in your list is the Dragon. It is also considered as a solid PvP monster throughout the game. It provides a lot of decent damage and at the same time, it also has the ability to actively stun your enemies.

For more information, you can check this idleheroes.pro list.