Blood Mage Sanguimancy node needs to be changed - opinion after endgame

I'm playing a Flameblast Blood Mage, level 90, currently farming tier 15 and 16 maps. This is my only character so far.

The life cost from Sanguimancy is simply too much, and the Blood Mage ascendancy is nowhere near strong enough to warrant being forced into taking an ascendancy node that doubles the cost for its abilities.

In regular mapping, this is manageable thanks to life on kill effects (though for most builds you'd be better off playing Stormweaver, sadly), but on bosses, you do significantly more damage to yourself than any boss does. Given that PoE 2 is so boss centric, this is hugely detrimental.

Leech is also extremely weak in POE2, so the spell leech node does not help - but even if it was good, it is NOT acceptable to force us to take a node that hurts us more than it helps, and have that node practically require that we take another node just to offset it. That means that blood mage is down 4 ascendancy points from the start - one node hurts us and we take another just to offset it? Not good enough.

It also does not help that blood mage is a life stacker ascendancy, yet there is almost no support for life. You can't get anywhere near enough life regen to offset the Sanguimancy costs, leech resistance makes leech do nothing on bosses, there is little % life, and there are few life scaling damage mechanics.

In my opinion, Sanguimancy should either convert 100% of mana costs to life costs (a better blood magic - leaving you with a mana pool that you do not use, which would be an interesting option for build tech), or split costs between life and mana 50/50. That would be an actual beneficial mandatory node instead of one that is actively detrimental and harms you way more than it helps. It becomes more manageable in the endgame, but bossing never stops being painful for any build aside from Detonate Dead (which has hugely out of line base damage, is probably gonna get nerfed anyway, and is better played as Stormweaver)

Yes! Anything. It's really annoying to have your first ascendancy points being effectively a huge debuff! Also the tree in general feels very limiting due to the huge cost of Sanguimancy.