This would have been faster/more complete, but my DSL is afraid of lightning.
Fired up my pally mutt (15 pal/3 monk/2 wiz), who happens to have empower and maximize. Devotion IV, HotD II, human healing amp III, monk healing amp I, and 10% on DT robes.
Got halfway through and realized I was wearing Torin's choker, so I had superior potency going.
Sat in the lobster alternately casting ardor on myself, meditating, doing little showoffy combat moves, and farting out clouds of healing ki. Not as many sample points as I'd really like, but it was boring.
Code:
Empowered Empowered
Sup Pot VI Sup Ardor Sup Pot VI Sup Ardor
78 133 89 121
108 104 89 125
97 129 133 133
108 104 114 133
125 121 97 133
108 100 93 139
108 110 74 125
85 110 81 85
100 114 104 100
125 121 108 118
avg 104.2 114.6 98.2 121.2
Overall avg w/ Sup Pot VI: 101.2
Overall avg w/ Sup Ardor: 117.9
These are roughly what I'd expect: 175/150 = 1.1666....
Empower values swung outside the unempowered numbers, both high and low, so I would surmise that it had no effect on things.
I'd also like to point out that there seems to be evidence against healing ki using Turbines patented "magic" dice that are half static (ie 1d4 would become 1d2+2);
81 / (1.3*1.2*1.1*1.1*1.75*1.4) ~= 17.5
A 1d3+1 is ruled out as well - that's a minimum of 20 on 10 rolls.
There's also a problem in the math, somewhere, in that:
17*(1.3*1.2*1.1*1.1*1.75*1.4) ~= 78.6 and
18*(1.3*1.2*1.1*1.1*1.75*1.4) ~= 83.2
So something isn't stacking the way I think it's stacking. I tried rounding after multiplying 17 and 18 by the output amps (1.75 for ardor, 1.4 for devotion), then the healing input amps, but no such luck. I'll try her out on atavern heal later to see if I can figure it out.