Moving Boss1TargetFrame without taint

[tehmoku]

So here's the entirety of my bossframe code

--[Bossframe scale]
for i = 1, MAX_BOSS_FRAMES do
    local f = _G["Boss"..i.."TargetFrame"]
    f:SetParent(UIParent)
    f:SetScale(1.2)
end
 
--[Lower the gaps]
for i = 2, MAX_BOSS_FRAMES do
    _G["Boss"..i.."TargetFrame"]:SetPoint("TOPLEFT", _G["Boss"..(i-1).."TargetFrame"], "BOTTOMLEFT", 0, 20)
end
 
--[Bossframe castbars]
hooksecurefunc("Target_Spellbar_AdjustPosition", function()
    for i = 1, MAX_BOSS_FRAMES do
        local b = _G["Boss"..i.."TargetFrameSpellBar"]
        b:SetPoint("TOPLEFT", "Boss"..i.."TargetFrame", "BOTTOMLEFT", -10, 29)
    end
end)
 
--[Set Points]
Boss1TargetFrame:ClearAllPoints()
Boss1TargetFrame:SetPoint("TOPRIGHT",UIParent,"TOPRIGHT",-350,-470)
Boss1TargetFrame.SetPoint = function() end

Obviously what matters is the

Boss1TargetFrame.SetPoint = function() end

I have tried

hooksecurefunc("UIParent_ManageFramePositions",function()

with no success.

-- Boss frames - need to move below buffs/debuffs if both right action bars are showing
    local numBossFrames = 0;
    for i = 1, MAX_BOSS_FRAMES do
        if ( _G["Boss"..i.."TargetFrame"]:IsShown() ) then
            numBossFrames = i;
        end
    end
    if ( numBossFrames > 0 ) then
        if ( rightActionBars > 1 ) then
            anchorY = min(anchorY, buffsAnchorY);
        end
        Boss1TargetFrame:SetPoint("TOPRIGHT", "MinimapCluster", "BOTTOMRIGHT", -(CONTAINER_OFFSET_X * 1.3) + 60, anchorY * 1.333);  -- by 1.333 because it's 0.75 scale
        anchorY = anchorY - (numBossFrames * (68 + BOSS_FRAME_CASTBAR_HEIGHT) + BOSS_FRAME_CASTBAR_HEIGHT);
    end

This is what I could find in UIParent.lua regarding SetPoint for boss1.

Anyway, my question is: does anyone have a way to move Boss1TargetFrame and keep it moved without massively tainting everything?