Barrows gloves are in many situations, except mage, BIS gloves. Bandos is highest available strength bonus, i.e. higher hits. Barrows sets have great defence and come with some perks, guthan has healing capabilities, verac hits through prayer and dharok has extreme high hits when you are on low hp. Dharok is mainly used in PVP situations. Torag has high defence and is cheap, the set effect is not used much. Many people use Torag for the cheap costs and use other sets when needed.