A General who has special uses for his gold
His primary skill:
Scholarly discount:
The trinket mage pays less for items from the shop.
Items cost 50/100/150/200 less gold to buy (minimum of 20 gold).
Cooldowns from item abilities reduced by 5%/10%/15%/20%
The discount may seem like not much, but for consummable items, getting them on the cheap can be an amazing boon. Teleport scrolls, mana potions, he starts paying only a small amount for each, and the cooldown reduction lets him use them faster.
Merchant Affair:
Requires Level 4 Scholarly Discount. Allows the TM to sell items to shop for their FULL price. Allows him to tailor his build easily to whatever he needs. (Note the amount he gains is the same as the amount it would cost him to buy the item, he cannot use the coin purse for infinite money).
Summon Contraption:
The trinket mage slashes together a Contraption, which explodes upon death.
Increases attack damage and speed at higher levels
Increases explosion damage at higher levels.
Can have up to 2 contraptions out at a time.
The contraption is a little bit minion, a little bit walking timebomb. They are fragile, but hard for a DG to deal with. Ignore it, and it hurts, kill it, and it blows up.
Attunement:
Whenever the Trinket Mage gains health, so do his minions. (Requires level 4 Summon Contraption)
High end fluff. TM drinks a potion, his minions gain some percentage of it. It is not a 1 to 1 ratio of DG health gain to minion health gain, however.
For the Road:
Acts as if the trinket mage were standing right next to the item shop, and had just right clicked on it. Allows him to purchase items quickly while in combat. This skill does have a cool down, and does cost mana to use.
Salvage:
Whenever Trinket Mage deals damage to a building, he gains back some as mana.
All those building bits shouldn't go to waste! Allows the TM to regain mana by pushing in lane. Works for any of his abilities (Includes explosion damage from contraptions, making them good suicide attackers against towers).
Conduit:
Summon a conduit onto the map that deals damage to nearby enemies, and drains them of mana.
While the conduit is out, it slowly drains the trinket Mage of mana.
Potential a big pay-off skill. This acts similar to a circle of fire, in that it will dominate an area of the map, and cause people to consider entering it or leaving it. Unlike CoF though it lasts until the mage is either out of mana, dead, or the Conduit is destroyed.
Barrage:
Hurls all the consumables in the mages possession at an enemy, causing a wild and lethal explosion. Does area damage depending on the total cost of the items in the blast radius, but the damage is split amongst all targets in the area (Meaning it does more damage to a single target, than a group of targets).
Visually this skill shows the mage throw a bunch of random colored potion bottles to the selected location, which explode on impact. One bottle is thrown for each consummable used for the ability. A decent direct damage skill that gets better as your ability to buy cheap items does.