Stalker Help

Hmm, can you post your build? My first guess is that you're possibly too low on accuracy or damage and thus needing to use too many attacks.

You will get powersink at 35 but really, you should be functional without it if you are setup right.

Also, on the IOs. If you're 30 and you can't afford IOs, then let me recommend the following easy steps:
1. sell all your DO and SO drops to the vendor of your choice
2. sell all common recipe drops to the vendor of your choice
3. sell all orange/yellow recipe drops that are not defense, resist, heal, or attack to the vendor of your choice
4. craft all yellow/orange recipes that ARE defense, resist, heal or attacks*
5. put the crafted IO on the market for a price of 800kinf (if no rare salvage needed) or 1.8m inf (if it needed a rare salvage)
6. sell all remaining salvage drops on the market for 1 inf
7. sell all tier 3 (aka large) inspirations on the market for 1 inf

Unless you power level you should be swimming in inf very shortly after following these steps. For crafting, don't spend more than 8k per common salvage, 30k per uncommon (possible exception being living tatoo and carnival mask run 100k from time to time), and never bid more than 1.2m for rare salvage.

* don't craft air burst or detonation. they are vendor trash.

Yeah once you get powersink all your endurance worries will vanish. Before the fitness pool was an inherent my elec/elec stalker used -only- powersink to keep the build running (I needed to skip fitness to work in 45% S/L defense). Powersink by itself was able to keep my eight toggles powered, it's a great ability.

The extra end reducers in your armors are wasted. Here's how it looks with Charged Armor, Conductive Shield, and Static Shield:

2 SO EndRdx = 0.44 end/s total for the 3 toggles.
1 SO EndRdx = 0.56 end/s
0 SO EndRdx = 0.73 end/s

So slotting just 1 each saves you just 0.17 end/s. Two saves you a further 0.12 end/s. To put that in perspective, if you just spammed Initial Strike as often as you could and had it slotted with 1 SO EndRdx, no recharge (other than Lightning Reflexes) it would consume 3.28 end roughly every 3.6 seconds, or 0.91 end/s, more than all three of your toggles put together even if they had no end reducers in them. With two EndRdx in Initial Strike that becomes around 0.73 end/s, saving you another 0.18 end/s. In other words, a second EndRdx in your cheapest attack saves you as much endurance as putting one into each of your 3 toggles.

So it would seem to make more sense to spend those slots on endrdx in your attacks. However, Gavin's got a good point. Monitor "Last hit chance" in your combat monitor window and make sure you're hitting 95% most of the time. If not, add an acc. I'm tempted to say max your damage slotting next, but while it is true that will mean fewer attacks to defeat, it's also true you've got a whole map full of enemies, so unless you want to spend a lot of time waiting between spawns you want to get your burn rate down to a sustainable level. Slotting endrdx instead of damage will do that but it will extend each fight. So long as it does not extend the fight to the point where you're taking enough damage to get killed, that's okay. So play with the balance between damage and endurance in attacks until it works.

I would say don't even bother with any endrdx in your toggles. Slot for resistance first. You will get much more end/s out of putting endrdx in attacks than in most any toggle.