Daomei
Yet I did not fully understand what you mean with "HP balance". Do you mean the HP left to any party, so that a severely wounded mob would act differently? I cannot confirm that from my observations. If you mean that a healer is perceived like a damage dealer (which perfectly makes sense), I agree.
I used the word "balance" because of the visual in my head. Put the party's HP on one side and the mob's HP on the other...
Whether you nuke a mob for 3k damage or heal a tank for 3k HP, the scales are tipped three thousand points in your favor. And subtracting a negative number adds while damage subtracts, so I think of heals as "negative damage" since it adds HP. Dealing negative damage is still dealing damage though, so yes, healers are treated the same as tanks and nukers.
As for caster HPM, my thinking is that the listed cast time may be 2.8s for singles and 3.0s for doubles, but then you multiply HPM by ( 1 + ( Amp_cast_speed_bonus / 100 ) ). A set of +97% Sup Zun amps can cast a double-missile in just over 1.5s (3.0/1.97=~1.52) and 60/1.52=39.47; just a hair under 40 HPM with good amps and no time credits. Since a lot of people use small time credits on big spells or "grind" amps that are closer to +87% than +97%, actual HPM is often a bit lower, but still well above 20. That's still a bit faster than most 2h weapons, but slower than a decent 1h weapon (especially Spear). Spamming enchants doesn't really affect speed since the cast time becomes a cooldown yet leaves the time between spells unchanged.
Speaking of enchants, I recall getting absolutely raked over the coals for saying that enchants actually did stop you for a split-second. A few people were not so kind about insisting that that was just an illusion caused by the animation and/or server lag. However, my experience is that if you are being chased by a mob that you can barely outrun, the gap between you may increase 1m every few seconds but will narrow by about 1m instantly if you fire off an enchant. Do I have a freaky internet connection or do you actually stop for a split second when you fire off an enchant?
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Do not assume that you speak for all just because you are the loudest voice; there are many who disagree that simply have no desire to waste words on you.