
LOKI
225 HEALTH
555 SHIELD CAPACITY
225 POWER
62 ARMOR
80 STAMINA
1.25 SPRINT SPEED
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+0.6 ENERGY REGENERATION
+40% KNOCKBACK RECOVERY
+88% POWER DURATION
+30% POWER RANGE
-60% POWER STRENGTH
+75% POWER EFFICIENCY
DECOY
6.25 POWER COST
50m TARGET RANGE
47.0 sec POWER DURATION
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SWITCH TELEPORT
6.25 POWER COST
50m TARGET RANGE
1s ENEMY TARGET CONFUSED
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INVISIBILITY
12.50 POWER COST
22.6 sec POWER DURATION
+400% MELEE DAMAGE
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RADIAL DISARM
25.00 POWER COST
26.0m RADIUS
∞POWER DURATION
200.0 PUNCTURE TO INFESTED CHARGERS
I basically play only with Loki and messed around with many builds but this is the one I settled on currently. It has perma invisibility (siphon recharges 13.56 energy during your Invisibility time which costs 12.5 energy) and has all 4 abilities. I decided to sacrifice sprint for Switch Teleport since I like all of Loki's abilities and I missed my ST, but you can just throw it back in there. At one point I was using Sprint instead of Redirection but those traps changed my mind...
It has 3 formas but it can be tweaked to use just 2 (I forma'd my Loki a very long time ago). Uses the Arcane Essence helmet, so if you don't have it, you'll have to tweak the fleeting expertise to get that 70% efficency.
It's pretty much perfect for solo play in my opinion.
Warframe Builder