I took Slice, Scav and Arch on my toon when I returned to game about a month ago.
Its been great. Ill play for a few hours and before logging off, head to the Fleet and sell a few hours worth of questing mats. Ill come back the next day and I would have made anywhere between 100-200K, sometimes more depending on demand and the zones I spent time in.
I have spent exactly no downtime sending companions on missions, crafting, dealing with crafting vendors or agonsising over gear needing an upgrade. If it needs an upgrade I buy it. All I do is kill stuff and hit nodes. Easy. Simple. Fast.
My toon was legacy lvl 5 (had'nt played since a month after release) when I rolled it a month ago. Its now level 11. Everything that I can unlock in charater perks (repair bots ect) has been unlocked. Ive bought upgrades for myself and my questing companion all the way through to the level cap.
It would have been better, alot better if I'd taken bio instead of arch but Im still pretty happy.
The only real downside is that I cant use reuseable stims but seeing I have enough cash to load up on tons of them anyway I dont think it matters all that much.
My orginal toon has bochem which cost me alot of time and money.