To finish raid 5 mechs:
Use Valiant Sniper at range 5 or 7 to drain the energy.
Even the boss with 196 energy can be prevented from attacking if you reduce its energy to 10 or lower with Valiant Sniper.
That is why you need Valiant Sniper myth level 47 = 186 energy drain for raid 5 as the boss’s drone needs 11 energy to be deployed / attack.
–> The mech will hop towards you.
–> If you start at distance 5 teleport as far away as possible in round 2 and use Valiant Sniper again. Then finish the mech off in the 3rd round at distance 2.
–> If you start at distance 7 use 2 myth heat weapons like Corrupt Light to shutdown the mech till you finish it off.
–> For the boss:
Start at distance 7, then use Valiant Sniper.
The boss will hop towards you.
In the 2nd round at the distance of 3 simply shutdown the boss with the heat weapons again like with the mechs.
And now leisurely finish it off and complete the raid tier 5 without damage.
The advantage of this way is that the “only” premium weapon you need is Valiant Sniper.
No need for any other premium weapon.
Edit: To everyone reading this, once again:
This only works for raid tiers 1-5!
Raid tier 6 is IMPOSSIBLE to complete without damage even with Valiant Sniper or any other item in the entire game as of now!