I see. Okay well I thought of a "next in the signal chain" solution. Since you aren't going to be using any clip effects or clip automation you could take the premise I suggested in my previous post and instead take the metering plugin, put it in a PC FX Chain module and put it at the very top of the PC chain so it appears IMMEDIATELY after the Input Gain.
In that scenario you of course would a) want your Prochannel to be Pre FX Bin/Rack and b) make sure your track's input gain is set to default (0db or whatver the default setting is). Also don't futz with the input control on the FX Chain module (so that's set to default to... just don't touch it and it won't affect the incoming level). Essentially just get that metering plug as CLOSE to the actual clip as you can in the signal chain and have absolutely NOTHING altering the audio signal until it hits the metering plug.
That of course is based on my theoretical premise that such a metering plug, inserted in such a way will provide an accurate readout of the clips output level.
I am also assuming you cannot bounce those clips together to create one long clip (likely lots of takes... ya?)
So this method totally bypasses the multiple clip problem. You may get little spikes at the very start/ends of clips though if they start abruptly (which can be solved with fade ins/outs or going into Preferences and setting the auto fade in/out time which is always a good idea anyway if you haven't already set that up). I HIGHLY doubt that will be a big issue for you though being the smart dude you are... and you could just ignore any meter spikes caused by abrupt clip starts.
There is still that little ruler between the Clips and Track Pane you could just use for a quick reference. The more you drag a track out vertically the more accurate/easier to read it becomes as well. That really is the easiest way to find max spikes in the clips. You have to do that in the Parent track though... not the take lanes because they have that dumb height restriction and I'm not even sure the ruler is on those.
Sorry... that's a bit of a chaotic post but I'm logged in for a while if you need me to clarify my ramblings.
Cheers.