Hey bro , dont create for main any support ( only if you have already a team that he will boost you.
Dont bother to do mage , atm you will spend so much time and money only for understand at the end that fighters can do it better,.
You cant play solo( only if you mean you gona play solo with 10 box support's.
Go for Titan best pve atm Tyrants ,doombringer ,gladiator and warlord are also very good on pve, top pvp depending on how much you spend on p2w items.
Also if you dont wana pay rlm for items and events etc etc dont bother