Need some late-game fire/stone advice

My tanker Flamequake on Virtue is level 45. He has all of the primaries (except Temp Protection), all of /stone except Hurl Boulder, CJ/SJ, Boxing/Tough, and Char/Melt Armor. He has SOs, generic IOs, and some uncommon IO sets. I have one Steadfast Protection -KB IO slotted in Tough, but no other KB protection. I have generally slotted him offensively, though he is reasonably durable for general play.

A couple of observations:

1. Melt Armor is incredible. I am thinking about getting Hasten just to get this up more often.

2. /stone is awesome at damage and mitigation, but is an end hog.

3. My original reason for fire/stone was to get /stone's knockup to keep foes in the Burn patch. Since the fear effect was removed from Burn, this is no longer critical, but the knockup adds nice mitigation nonetheless.

My questions:

1. I am having major endurance issues when fighting AVs, Monstes, and other long-duration fights. All of my attacks have one SO-equivalent in Endredux or more. /stone is just an end hog, great as it is. Consume is not coming up often enough to be significant here. I guess I have to just add another slot to my attacks and add more endredux. Stamina is 2-slotted with generic IOs. I am open to suggestions here.

2. I am fairly squishy by late-game tanker standards. Should I care about this, or just focus on damage and self-healing via Healing Flames? Is it ok to just accept my "off-tank" status for high-end content?

3. I have about 10 million influence plus another 10 million or so in salvage I could pawn. I also have 200 reward merits. I am considering blowing my wad to get either a LoTG IO, the +regen/recovery IO (Miracle? I forget), or another Steadfast Protection -KB IO. I am also willing to simply get uncommon IO sets for all of my powers (I only have about half of my powers with sets, the rest are SOs) to improve overall performance (especially endurance!) without regard to set bonuses. How would you spend your influence/merits in my situation? I know it's not a huge bankroll and I'm willing to stockpile instead if that makes more sense.

4. I have two power selections left at 47 and 49. I am considering the following powers: Hasten, Weave, Acrobatics, Fireball, and Temperature Protection. What powers would you take to improve survivability? I am seriously considering Hasten and Weave but I'm already gasping for blue candy after a substantial fight.

Thanks in advance. I'm not looking for a specific build, by the way, and I am happy with the powers I have so far.

First off U should of taken weave awhile back, second off temp prot is not as great as some might think. If u are having problems with end do not take acrobatics its another end hog. If u go to mids and try to build u one there, there is sets that can help u with end there and recharge. As for me with any fire tanks I have gotten I always take energy mastery for the main reason of conserve power. My lvl 50 has 3 end giving u might say 1 consume, 2 conserve power and 3 the Incarnate ageless.

For endurance usage, the recovery uniques and the performance shifter proc are definitely worth it. Between all 3 you'd be adding another ~.85ish end/s recovery, which is fairly significant. Aside from that, look into +max end bonuses. Not as common as +recovery, but each percent of +max end also multiplies your recovery in addition to giving you a larger cushion before you run out (the +end accolades are also nice). Partial eradication sets (frankenslot the remaining slots) in burn and tremor are a nice place to start, you can also stick a pair of mocking beratement in taunt, and impervium armor is another, albeit expensive, option. Also, crushing impact in your ST attacks is a nice mixture of good set bonuses and nice endurance reduction, and is only an uncommon set.

If you're patient you can cash out your merits and any alignment merits for whatever will sell for the most on the market and use the proceeds to buy the procs/etc for as cheap as you can - this will probably be the cheapest method, but take longer. Alternatively, you can just earn enough regular/alignment merits to buy outright whatever you're looking for.

In my opinion, weave would only be worth it if you're going to be stacking significant defense. If you don't already have (or are planning to get) large amounts of defense from sets, I don't think weave is worth the endurance drain. Fireball, on the other hand, seems tailor made to complete a nice AoE trifecta with tremor and burn. For the last power, hasten is nice but you are correct about the end crash. I'd almost be tempted to take temperature protection at 49 - less for the resistances than for the protection from slows and a place to put another -KB (regarding -KB, it's my opinion that a fire or dark tank should have 3 -KB ios).

Most players who take Pyre mastery are looking for Fireball. A few might want Char to slot for set bonuses (for example, 2 Basilisk's Gaze IOs will get you a nice energy/negative defense bonus). Hardly anyone takes it just for Melt Armor. I myself have in the past argued that melt Armor is...not useless...but I still hesitate to advocate for it.

What I am suggesting is that you take, and slot up, Fireball -- or drop the Pyre mastery pool entirely, and instead grab Energy Mastery for Conserve Power and Physical Perfection, both of which ought to help with your endurance issues. If you have slots left, Energy Torrent (unlike the Blaster version, the Tanker ancillary version does knockdown, NOT knockback) will give you even more lovely knockdown mitigation.

Performance shifter proc: 20% chance for 10 end, every 10 seconds. That's 0.2 end/s. If you're comparing it to a 3rd level 50 endmod, stamina is 0.4165 end/s. 2 level 50 endmods get you up to about 1.8x enhancement, or about 0.75 end/s. A third gets you to about 2x, or about .83 end/s, for a difference of perhaps 0.08 end/s - the performance shifter proc is better.

Unless you were assuming I was suggesting replacing the second level 50 endmod with the proc? That'd be pretty silly, and not what I was suggesting he do.