That´s the point... lightning and heal are fine, more than that, they usually are at 75-90% force while spamming.
lightning = light effusion = u wont run out of mana, but it's a pve only spec
heal = consumption spam = fine, even if you start to lose some hp, 1 HoT = fine
madness/light hybrid is fine, if you take the talents, but that's the problem, it's high tier, so madness get's rly worse, usually you end up spamming lighting until you have some force (and by that time u had like 2-5 wrath proccs)
Since the 31 madness talent is anyway nearly useless, there is no reason going for it... bw needs to fix that, or not.