Actually, I consider Air Defence Arty to be a good gig if you
can get in there. They've now renamed it DA Battalion, but as the
former SADA it was considered "combat", albeit physically "2nd-line
of defence combat"* - but also too operational-ready to be lumped
together with the more generic PDF forces.
One viewpoint then was that they get the soldiers who're
legitimately combat-fit, but lacks the ideal physical
characteristics for army delpoyment one way or another. But
educational qualifications also play a big factor, given the
sophisticated weapons (SAMs, radar, AA guns) they have to
operate.
They also have these FDS's (Field Defence Squadrons) who're
basically infantry troops protecting the air bases, though I'm not
sure how they're presently organized with conscripts. It used to be
that some PDF reservists were redeployed there.
Overall, it's comparatively a small force - only 2 "active" DA
Battalions if I'm correct - & thus may not recruit NSF's en
masse if they replenish via the ORD method.
*Not really true, cuz their standby status is supposedly very
super-on for everyone (inc. reservists) due to the aerial theatre
they're expected to war in & also due to the sensitiveness of
their equipment. But I heard that life isn't as physically
exhausting for them when compared to army.