depents on the lvl you wanna play
in pve wardenheal is by far the best and thats a fact! in pvp wardenheal is fine in bgs but later on in champion dominion he doesnt fit the the current meta
what makes a wardenheal strong are his powerful heals and hots and your hots will just be dispelled all fight long (until 7.0.2
) and you usually have a support buffing double heal for you so you overheal quite a bit which is a waste
if you look at cleric he has weak heals but many dmg recude and shields to give and with the double heal buff from his allies he can heal enough to keep you alive also he doesnt rely on hots
so choose for yourself
wanna do more pve or pvp and if you choose pve will it be high end champion dominion or just some bgs?