Beta server building method...and tis is a new approach for me, but I liked it.
Using auto level, step to milestone levels for the character. Ymmv but for me that's 7, 17, 22, 35, 44, and 50.
Outfit the enhancements the best you can along the way, saving screenshots.
You now have a roadmap, and an idea of the pain points as you build out
Just last night I did this with a Pistols/Devices blaster. Early on I made the decision I wanted to prioritize End Recovery Bonuses, then Damage, then Def/Resist. I made these decisions by exploring slot bonuses and sticking to my arbitrary "flavor rules" for this character. In this case that meant no "super" travel powers outside of Infiltration and Combat Jumping. It Ended up being very AOE centric as well.
This morning I joined a PUG in PI and said toon is now 22. I need to kit him out, but I know if I exemp down, what I can go for as essential for making it workable.