Ok, first thing to mention:
Most of those Cleric damage mitigation skills [i.e. e.g. Safety Zone, Foretell, Sterea Troph] are not buffs but magic circles with beneficial effects. You still get knocked down or knocked back and once you’re out of their AoE, you don’t have any beneficial effect at all.
The only exemptions of that are Ausrines invulnerability effect and Golden Bell Shields invulnerability during channeling.
However, in contrast to Archer, except for Safety Zone and Counter Spell all of these useful mitigation skills require Circle 2 or Circle 3 investment to unlock them.
Archer just needs 1 Circle in a Class to unlock them.
e.g. you could make Archer2>QuarrelShooter1>Scout1 and have 2 skills to avoid physical damage. Or Archerx>x>Scout1>x>Falconer1.
2nd thing to mention: Every Class can heal themselves with potions.
The new potions heal a suitable amount so that you can survive even reckless gameplay if your equipment is good enough.
Heal is mostly a damaging skill with potentially one of the highest damages Clerics can get, so why waste it for your HP when potions do an equally good job?
Btw, Classes like Alchemist (creates potions) and Featherfoot[leeches enemies’ HP] can also provide stable heals for Wizards.
Last but not least:
The difference I stated as a suggested change would be 840 HP more for 150 CON.
I Don’t understand why people would argue with buffs and damage mitigation if the difference allows for 2-4 more hits to be taken PVE-wise before you die.
Btw, the nerf of Aspersions defence boost to a flat value that’s boosted by level and SPR will definetly take its toll in increased overall damage, so improved HP-gain via CON for Cleric[and maybe for Swordsman,too] would definetly be more advantageous.