cold dom is pretty easy to make end non issue with the heat loss power, however that power is lvl 38 power so it wouldnt help in early lvls
rad emission is also a light end secondary unless you have the debuff toggles on, and accelerate metabolism boost end gain making it less of an issue and you get the power fairly early on
kinetics also has a power which makes end a non issue too but that is also a later power (lvl 35 power)
as for the primary, they are all fairly equal in terms of end, just need to make sure you slot right on them
Self-endurance help tools are:
Radiation: AM at level 4
Cold Dom: Heat Loss at 38
Kinetics: Transference at 35
Radiation does rely on expensive toggles though, so I've never found AM to be that helpful.
So my advice on secondaries is just dont go Sonic or Storm.
For a primary, I might suggest Sonic Blast. You can generally get by without Shout, and just use Scream and Shriek as your basic attack chain. This means two attacks to slot instead of 3, allowing you to slot them up better earlier, for better damage per endurance.
e.g.
Shriek, 1 acc, 3 dam, 2 end redux
Scream, 1 acc, 3 dam, 1 end, 1 rech
This will be much more efficient than 3 attacks all slotted 1 acc 3 dam.
And Howl is a mere 10 end to fire off compared to 15 for a lot of other AoEs.
Archery is fairly easy on the blue bar for primaries and its counterpart, Trick Arrow is endurance light.
I have a couple of /traps corruptors that I've debated skipping Stamina on as well.
as the title asks, what prime and secondary use the least end, or at least make end a non issue? not taking stamina into question.