Your spells will be the best equipment you can get. But don't waste plat and book space buying ones that you won't get much use out of (e.g. ones that are quickly upgraded).
Note some of your hp buffs are also actually heals, such as Valour (and I think perhaps Centre).
If you are having problems with your heals getting you aggro try using your buff spells to heal instead as they don't generate so much hate.
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