User blog comment:Helios Ex/Helios' Mobile NM guide/@comment-24659969-20151228143254

Get red power assist armor and at least normal titan arm, shoes and helmet, all at have to be **10, Shockfield and Hornet should also be obtainable at 30s already, even the normal one is fine but must be ***10.

Get 4 fast movement, 5 reload, 25 crit skill + only 1 point in your default or if you want a bit defensive, move the crit skill about 10 points to BAE.

Bring in HD ammo and at least get HD ammo mastery to level 3 (Should be reachable if you've been using HDA to kill everything from level 10 or 15s)

Helm = dmg + crit

Body = HP regen + body fueling (normal or red power assist damage fortification are not worth it)

Arm = Nimble + phy defense ; you should also try to get the 3rd level mastery. How to get 3rd armor mastery before reaching lv 35? Don't use other armor part and fast run zombie pods. That way all the armor mastery will go to glove mastery.

Leg = Machine assist + phy / body fueling

Boot = Machine assist + physical

Shockfield = deadly + capacity + pin point / overclock in mobile

HIKS sniper (desktop only) / Hornet / Striker (desktop, seriously it is good in desktop version) = Deadly + overclock (hornet) / tenacious + capacity

With this build, I tried and I could go catching up with higher levels. Just need to be careful not to get hit since your defense is still low now matter how.

tldr: be a glass cannon