Glory
Sorry you are frustrated.
I have repeatedly blamed 5* HotM advertising for convincing new players that 3* / 4* heroes are worthless and 5* heroes are always better.
I would love a 4* HotM.
4* Heroes are the backbone of Empires. 4* heroes, plus Forge Level 17, can complete all of the game.
Solo snipers
Joon and Isarnia are glass cannons. But this team is mostly solo snipers except
Mitsuko who is useful for defense teams but not as useful versus normal titans, map bosses and triple bosses. Similar to Li Xiu.
Isarnia ( who I actually like but ) suffers from Classic 5* Hero syndrome - everything that was programmed later could be better, faster, stronger.
Team heroes
I prefer team heroes.
Wu Kong teams
([Play Style] The cascade squad or Wu Kong+ two healers- New Notes 2019-Mar)
(Wu Kong grinder gang or Powerful rainbow auto play team or Wu Kong plus 4 healers)
Proteus
(Proteus or Domitia first? - #13 by Gryphonknight)
Boldtusk
(What to do with fighter emblems? - #12 by Gryphonknight)
It really sucks that the most common 5* heroes in the game are mostly solo heroes, slow heroes, or both.
Generic advice
Comparing heroes
([Math] 4* 4.70 > 5* 3.70 > 4* 3.60 > 5* 2.60 > 3* 3.50 ( base stats and special skills ) or Comparison of Partially leveled heroes by rarity [More Math])
Roster
But it depends on your roster.
I shoot for completing rare quests soonest, then class quests then Titan loot tier 9+ then Platinum/ Diamond raid arenas.
Color stacking
Color stacking is the hidden buff of Empires.
Color stacking
Hero XP
It is much faster to color stack lower rarity heroes:
5* Heroes
But eventually it does make sense to level 5* instead of more 4* heroes.
FIN