Advice on Feats - Changeling Rogue(Thief) + Artificer(Cartographer)

Any advice for good Backgrounds / Origin Feats / General Feats for this build? 

Planning to start Rogue to get weapon proficiencies/skills, do Artificer 3 (to get Cartographer map + teleports), then back to Thief till 17 (probably).

Drawn to Thief for Fast Hands (using scrolls / wands as BAs seems awesome in an Artificer party I am working on).

Considering using Fog Cloud / Eversmoking Bottle w/ BA Hide so will prob take Skulker at 4th/8th level to get Blindsight but definitely looking for ideas.

But what is the actual goal or playstyle you're trying to accomplish, or build problem you can't figure out?