  We propose a finite-temperature phase diagram for the 2D spin-$1/2$ $J_1-J_2$
$XXZ$ antiferromagnet on the triangular lattice. Our analysis, based on a
composite fermion representation, yields several phases. This includes a
zero-temperature helical spin liquid with $N=6$ {\it anisotropic} Dirac cones,
and with nonzero vector chirality implying a broken $\mathbb{Z}_2$ symmetry. It
is terminated at $T=0$ by a continuous quantum phase transition to $120^\circ$
ordered state around $J_2/J_1\approx0.089$ in the XX limit; these phases share
a double degeneracy, which persists to finite $T$ above the helical spin
liquid. By contrast, at $J_2/J_1 \simeq 0.116$, the transition into a stripe
phase appears as first order. We further discuss experimental and numerical
consequences of the helical order and the anisotropic nature of the Dirac
dispersion.
