DM/SR Soul Mastery lose endurance to fast, help build please.

My DM/SR Soul Mastery Brute loses endurance in a blink of an eye, I will be using mostly for pve, I was thinking of using 3 Enzymes HO's on all my attacks, and Darkest Night and Cytoskeleton on all my toggle defenses. Would this help with my end drain, also would like opinion on IO's but have no idea where to start with them. Here's my current build it's only got SO's.

Villain Plan by Mids' Villain Designer 1.953
http://www.cohplanner.com/

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Level 50 Natural Brute
Primary Power Set: Dark Melee
Secondary Power Set: Super Reflexes
Power Pool: Leaping
Power Pool: Fighting
Power Pool: Leadership
Ancillary Pool: Soul Mastery

Villain Profile:
Level 1: Shadow Punch -- Acc(A), Acc(3), Dmg(7), Dmg(13), Dmg(36), ToHitDeb(39)
Level 1: Focused Fighting -- DefBuff(A), DefBuff(15), DefBuff(19)
Level 2: Smite -- Acc(A), Acc(3), Dmg(7), Dmg(13), Dmg(36), ToHitDeb(37)
Level 4: Shadow Maul -- Acc(A), Acc(5), Dmg(5), Dmg(11), Dmg(34), ToHitDeb(37)
Level 6: Focused Senses -- DefBuff(A), DefBuff(17), DefBuff(21)
Level 8: Siphon Life -- Acc(A), Acc(9), Dmg(9), Dmg(11), Dmg(34), ToHitDeb(37)
Level 10: Practiced Brawler -- RechRdx(A), RechRdx(15)
Level 12: Agile -- DefBuff(A), DefBuff(19), DefBuff(23)
Level 14: Super Jump -- Jump(A)
Level 16: Dodge -- DefBuff(A), DefBuff(17), DefBuff(21)
Level 18: Dark Consumption -- Acc(A), Acc(29), EndMod(31), EndMod(40), EndMod(43), RechRdx(46)
Level 20: Evasion -- DefBuff(A), DefBuff(23), DefBuff(27)
Level 22: Combat Jumping -- DefBuff(A), DefBuff(46), DefBuff(46)
Level 24: Touch of Fear -- Acc(A), Acc(27), Acc(29), ToHitDeb(40), ToHitDeb(40), ToHitDeb(45)
Level 26: Boxing -- Acc(A)
Level 28: Lucky -- DefBuff(A), DefBuff(48), DefBuff(50)
Level 30: Tough -- ResDam(A), ResDam(31), ResDam(31)
Level 32: Midnight Grasp -- Acc(A), Acc(33), Dmg(33), Dmg(33), Dmg(34), ToHitDeb(36)
Level 35: Quickness -- Run(A)
Level 38: Elude -- RechRdx(A), RechRdx(39), RechRdx(39)
Level 41: Gloom -- Acc(A), Acc(42), Dmg(42), Dmg(42), Dmg(43), ToHitDeb(43)
Level 44: Darkest Night -- ToHitDeb(A), ToHitDeb(45), ToHitDeb(45)
Level 47: Weave -- DefBuff(A), DefBuff(48), DefBuff(48)
Level 49: Maneuvers -- DefBuff(A), DefBuff(50), DefBuff(50)
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Level 1: Brawl -- Acc(A)
Level 1: Fury
Level 1: Sprint -- Run(A)
Level 2: Swift -- Run(A)
Level 2: Health -- Heal(A)
Level 2: Hurdle -- Jump(A)
Level 2: Stamina -- EndMod(A), EndMod(25), EndMod(25)
Level 2: Rest -- RechRdx(A)
Level 4: Ninja Run

Not to be rude..but..is this a serious question? Playing an end heavy set like SR (lotsa toggles, +rech meaning your attacking MORE), not slotting ANY end reduction, in anything, and you wonder WHY you are running out of end?

I think the only sets that could get away with that are things like claws, regen and willpower. Anything else..you need end reduction. At least one if those toggles..one in your attacks to. The to hit debuffs in your attacks, while not worthless, are pretty close to, when you consider the actual % gained, and that it will be resisted too.

If you are just using SO's, you could do far far worse than the body epics and physical perfection also.

Oh and slotting combat jumping for 3 def is a waste..likewise the Passives can easily just have two slots.

And you NEED end red in darkest night too..or you will flatline in two seconds. Also, pretty much the main reason for taking Tough on an SR is a spot to put the steadfast +def IO. If you are not using that, you are better off to go with leadership/manu or stealth.

I don't have access to Mids' right now, so I'm not going to tear apart that build right now, but I can make a few suggestions.

1- Slot Endurance Reduction! MisterD is right, you can't get away without them. Dark Consumption just doesn't come back fast enough to be your sloe source of End management.

2- Frankenslot! High end builds are expensive, but you can get very similar results by mixing and matching set IOs (commonly referred to as "Frankenslotting"). For example, replace all the Defense SOs in your toggles with Def/End IOs (remember that you can only use one of each in each power, so you'd need a Red Fortune: Def/End, a Gift of the Ancients: Def/End and a Karma: Def/End, for example, not three Red Fortune: Def/End in a single power. Stay away from Luck of the Gambler for now, it's really expensive).

3- Drop the To Hit Debuff from your attacks, and replace with an End Reduction. The ToHit Debuff doesn't really need slotting, especially since most of your attacks are single target, so you're debuffing the guy who's about to die, but not the ones that are staying alive to punch you. It just doesn't benefit you that much.

4- From level 30 up, Common IOs are better than SOs. Whenever your salvage is full, go to a University and click on a crafting table. In the bottom corner of the window that pops up, there's a filter. Set it to hide recipes missing ingredients. Craft as many Level 50 common IOs as you can with the salvage you've got, and replace your SOs with the equivalent IOs. Because they've got higher values, you can safely drop the second Accuracy you've got in most of your powers and add more recharge or end reduction, as you see fit.

5- Go do some missions in AE until you've got a big pile of tickets. Roll Bronze level 10-15 until you get a Steadfast Protection Resist/Defense (Unique). Craft that and put it in Tough.

When I get home, I'll see what I can slap together for a basic IO build. Do you have a budget? I'll assume that you don't want the 10+ billion Inf build that I'm currently working towards, but if you've got some savings to work with, I can suggest some better sets as well.

You don't need 3 Enzymes in every attack - in fact, I would definitely not recommend that, you'd have to give up a lot of acc/damage/recharge enhancement for that.

What you DO need, as the others have said, is endurance reduction. Putting some in your toggles is helpful, but it's even more important to put some in your attacks, because the lion's share of your endurance is spent on your attacks. Usually, you want at LEAST one SO's worth of endurance reduction in every attack.

If you're a VIP, you could also consider the Cardiac or Vigor alpha powers.