Thanks for the update, the Wiki made it appear as if he had a base DD of 30% but it does make sense it's his base 20% plus two lots of Agility at 5%. I'll update the Wiki to clarify.
You can respec him of course, so start with a less brittle companion and when he gets to the sort of level you start facing the more deadly-trap dungeons you can rewrite him.
Why would you elect to "ignore" Tinkering equipment? That makes zero sense.
Explorer Gauntlets are available
for sale from
Trader Orac for just over 3k. It's not like they are a high-level rumour boss drop or the reward for a horrific dungeon; all you have to deal with is one
Angry Ghost (a Vengeful Wraith) and he can be quite brutal at low level, though perhaps putting a Companion on hold, luring him out, and using a Potion of Speed and a Scroll of Recall (or whatever evasion tactics to prefer) to avoid the fight loot the corpse for the
Rhayader Medallion. Anyway, the gloves add a total of
15% to Disarm Devices as they have
Tinkering 2 (5% per level is 10%) plus they add a point of Agility, and besides that with their total bonus of +4 Armor (+3 base, +1 from Agility) make them too obviously desirable for any Rogue or Warrior player or Companion.
Indeed, Explorer Gauntlets literally give Adaon the
exact boost you suggest is required. That you have ignored them is perhaps the reason you're basically 15% short of an optimal build.