Seems abit unnecassary to have to level a tier 1 pet each to lv 90+ each time you want to use a tier 2 pet when you already unlocked it one time already ..... Takes away abit of the fun in the game.
An Idea: Make a talent for amulets/ring trinkets , like make them give additional extra damage. Like you did for cooldown trinkets. Would make abit more exciting to recieve these trinkets when they drop...
 "Idle Wizard"){kind=icon}
 "Midas' Gold Plus"){kind=icon}
 "Crusaders of the Lost Idols"){kind=icon}
 "TDP5 Arena"){kind=icon}
 "Sentry Knight"){kind=icon}
 "Loot Hero"){kind=icon}
 "Idle Mine"){kind=icon}
 "Arkandian Explorer"){kind=icon}
 "Paladog"){kind=icon}
this is as part of build-up. in late game now, to pick t2 pet need only few mins.