How to beat me in PvP

[Lissa]

Yes, you are correct - any warlock trying to get over 500 spell damage will have to sacrifice too much life for it to be worthwhile. But as I said in my post, at around 400-500 spell damage, you can have about 5k life. While your spreadsheet is quite nice, it does not account for enchants (but you already knew that) or set bonuses (which can be very significant). Consider this setup:

Field Marshal's Coronal
Choker of the Fire Lord
Field Marshal's Dreadweave Shoulders
Cloak of the Brood Lord
Zandalar Demoniac's Robe
Nemesis Bracers
Ebony Flame Gloves
Nemesis Belt
Fel Infused Leggings
Nemesis Boots
Band of Dark Dominion
Band of Forced Concentration
Grand Marshal's Stave
Dragon's Touch

426 spell damage, bonus 2680 life without enchants or set bonuses, but it becomes 515 spell damage (30 spell damage on weapon, 2x Zul'Gurub enchants, 23 dmg Nemesis bonus) and bonus 3220 life (200 from ZulGurub Enchants, 150 from PvP set bonus, 190 from chest/bracer) with them, which should put you over 5k life.
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Do you realize how long it would take to acquire the BWL gear, Z'G quests, and reach Field Marshal?

On SR alone, it takes months to achieve Field Marshal. Reaching rank 8 only takes a month and a half or two, reaching rank 11 tanks another month and a half and then it takes about 3 weeks to a month to go from rank 11 to rank 12 and about the same from rank 12 to rank 13. That's close to 6 months just to get Field Marshal/Warlord of constant BGs taking around 8 hours a day. While doing that trek, you do nothing else really (Merana that just reach Grand Marshal this week has only raided with Avarice a handful of times during that trek and has never set foot AFAIK in BWL). What you're advocating is probably a year to get all this gear. The game has only been in retail 14 months.

So, what you're saying is extrememly difficult to nigh impossible at this point.

Theory is fine and all, but it doesn't work in practice.