To put it simply : you can't have a ranged tank.

Mage tank ? sure. Easy enough with simply the cleric as an example. Heavy armor, mace, magic. Done.

But ranged tank ? How do you tank at range distance ? All mobs are closing up the distance except a handful of them (mostly the kedtraps and monkeys). So a ranged tank is a false concept. It'll be a melee tank with ranged weapon, but this ranged weapon will have no use. You can attack mobs from afar already if you lose them (provoke, tomahawk, shield lob)

The only way you can have a ranged tank is a kiting tank, and it's just THAT bad of an idea.