[Stratos]

If your're a sorcerer there is a lv 2 spell called Knock which can open up locked doors and chests. You can also bash them open, or let your henchman do it, or you could use spells. If possible try to equip an item that does some kind of elemental damage as well. The Desert Wind scimitar does some fire damage and is an excellent 'bashing' weapon. That's how my druid opens all his chests and doors.

As for the traps, well, alot of them can be avoided once you have found them and considering that you can always rest as long as there's no enemies near, traps shouldn't be a problem. You can also use summons to trigger them ( a bit expensive I know) but since your're a F/P/S you should have great saves so I don't see how traps could be a problem.