There is no elf cave or Bless spell in the Enhanced Edition.
Warriors can pick up some skills that don't rely too much on intelligence (like summons, buffs) or dexterity (that can be boosted later with equipment bonuses), or Divine Light also clears surfaces and clouds within its cone area of effect, in addition to the warm effect and bodybuilding / willpower debuff.
A point in Aerothurge would give access to Teleportation and Thunder Jump (the stun effect wouldn't trigger as much with a low intelligence, but it gives a relatively low AP way to get into the thick of battle, though wouldn't help for opponents in fire surfaces). A point in Geomancer would give Midnight Oil (slow opponents, or set up for fire surfaces and smoke clouds, or expand the fire surfaces you mage makes), Boulder Bash (no line of sight required) and the spider summon. The scoundrel skills Walk in Shadows (invisibility), Winged Feet (lets the character walk over surfaces unaffected) are useful in and out of combat, and Fast Track and Trip could be useful (more so after getting some dexterity bonuses); the adept skill Cloak and Dagger (teleport) can also be handy.
