-Ionised salt bomb
-radiant sun shards
-Heavy Deconstructor
-Vitasuit Deluxe
-Winmillion

All of them lack 5* upgrade, why, who knows?
Why them should have 5* upgrades
well Winmillion have lot of potential due its high attack speed and cool charge attack, but no one uses its because it lacks 5* upgrade and everyone likes leviathan (or any other 5* normal sword) more.
Construcks, i find them annoying in tier3 arenas when they attack in a group, if heavy deconstructor would have 5* upgrade it would be very helpful in arenas.
Crystal bomb line, i dont see them very often. i actually havent seen ionised salt bomb never even i play almost daily, they need 5* upgrades and they are only dual element bombs. show them some love.
Vitasuit deluxe, health bonus is always cool, so why not 5* upgrade.
Then we need more shadow and pierce bombs, there is goddam six 5* elemental bombs, aand only one pierce and shadow one. whats the point?

And why there cant be shadow/pierce and shadow/elemental armor/shield/helm what starts at 2* and go all up to 5*, this would be good to beginners that they can have like cobalt helm, cobalt armor and element/shadow shield. it would make easier to make balancehd set, because its difficult to get vide variety of armors when you start game. This would make game more enjoyable when you dont have to stress of your armor does it have enough defences, and when player get his armors to 5* then he can start getting vider variety of equimment.

I rest my case.