HR as far as I understand it 20% of the blocks are ASIC, 20% are Scrypt, 60% are GPU (I do not know if these are equally distributed).
That's not the issue. The block find distribution is 20/20/20/20/20. About that there is no doubt.
The question is how does MultiShield adjust each algo's diff and as a function of exactly what? We know that before the most recent hardfork, global network hashrate (that is the combined total of the 5 algos) was key, and that all the algos diffs adjusted in response to changes in aggregate hashrate. The question is how much did that change? To what precise degree are the algos currently independent, and to what degree are they still inter-dependent?