No need, there's nothing particularly "custom" about your request.
For a new-player friendly, solo Mechanic, I'd recommend this one:
https://www.ddo.com/forums/showthrea...=1#post5797836.
I threw one on a pure F2P alt account, and found it was solid in all respects, leveled quickly, and was fun to play. Save up and buy a Vorpal Great Crossbow on the AH.
Any of these are perfectly viable today:
https://www.ddo.com/forums/showthrea...=1#post5759362
Drow are good for multi-attribute builds (like a Paladin, etc.), and/or when you really want a 20 in Dex, Int or Charisma. For a Rogue, they give Dex and Int a nice bump, and have a boost to Spot/Search as well, which is also helpful. You could tweak most Rogue builds to suit a Drow, but they're not necessary.
If you want Drow, I'd start here:
https://www.ddo.com/forums/showthrea...=1#post5635304
For 28 pts, drop Dex to 16 and bump Str to 10. In place of the Harper tree, put just 3 pts into Thief Acrobat for speedy movement (awesome on a ranged build), and the rest into more Assassin.
(If you want Epic, Dex should really start at 18 for Combat Archery, but that's waaay down the line, and not F2P, so ymmv.)
You could also combine the two, using the stats for a Drow and the Class order for the self-healer. No Dragonmark, but take Empower Healing in its place (ala version #2) and you'll be good enough.
WF have the healing drawback, so really need some access to magic to self-heal. That usually means either Wizard or Artificer for the Repair line of spells (tho' there are other routes). Meanwhile, they have little that specifically benefits a Trapper, so... nah.
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http://ddowiki.com/page/Glossary
@ all newer players: For any newbie-friendly trapper build (inc. multi-class, below), all they need to do their job is decent gear (level-appropriate or close), and enough skill points to max Spot, Search and Disable Device, and half-ranks in Open Lock - anything else is gravy. So that leaves combat, and those choices are pretty straight forward too.
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https://www.ddo.com/forums/showthrea...or-new-players
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https://www.ddo.com/forums/showthrea...=1#post5793839
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https://www.ddo.com/forums/showthrea...or-new-players
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https://www.ddo.com/forums/showthrea...izard-Rogue%29