For my thid toon Sencia (24 shade) she's spec 24 cs, 22 stealth, 10 pierce, 5 cd, 6 envemon. Honestly, it was just dumb of me to take stealth to 22, just take it to 20 and mod it, and increase your stealth detection with MoS, or if you want more power put your rp into wild power or MoPain.
As for my thid ranger, I like pure snipers, so when I hit 24 with my ranger Razmitaz I took her bow 24, stealth 18, path 10, and the rest into melee. She's gimp when forced into a melee combat, but her bow shots hurt like hell to even tanks, and because her stealth is 18, she's not as easily seen by enemy stealthers.