I would say stealth... but then again i would :P. but it can really help
I wouldn't be without smoke, so that's my advice
"Well, they found my diary today.
They were appropriately appalled
at the discovery of the eight victims
They're now putting it all together.
Women wrapped in silk
with one leg missing
Eight legs, one body, silk,
spider, brilliant!"
Smoke is probably more effective than stealth, especially in PvP.
I really should do something about this signature.
Defo smoke with 3 to hit debuffs
Defiant's GoEH/MILITIS METUS
Cheers guys, I think I was leaning towards smoke a bit 
- Kal
Hi Guys, my fire/fire Dom is coming along nicely, but I wondered about peoples' thoughts on the following powers, as I hve to choose 1 from these:
1) Smoke
2) Stealth
3) Different travel power to Superspeed (more vertical movement)
I am partly leaning towards either smoke or stealth....
Assuming I solo and team, which is more useful, PvE and PvP?
- Kal