Here is the Math:

One pump supplied with 10 MJ per tick pumps one bucket of lava per tick because the pump uses 10 MJ per bucket pumped.

Now one 36 HP Boiler uses this much fuel at max heat per tick. ( (6.4 - numTanks * 0.08) / ( 16 LP or 8 HP ) ) * numTanks

So ((6.4-36*0.08)/8)*36. This equals 15.84 fuel used per tick.

One bucket of lava in a boiler is 1000 fuel. As we get 1000 fuel per tick we have the lava for 1000/15.84 boilers. This equals 63.13 or 63 Boilers.

Because lava is not a liquid source, it must be packaged in a solid format such as a bucket. Using a bucket also gives you the bucket back. We therefore need one liquid transposer for each boiler. The output from the liquid transposer goes to the boiler and the empty buckets are pumped out back into the transposer. We use 4 buckets in the system per Boiler.

The overall output of this would be 63*(20(HP Value)*36(Number of Tanks))*1/5 5 mb of steam per MJ. This resuts in 9,072 MJ per tick.We then have to subtract 63*4 for each liquid transposer as well as 13.3(Energy Tesseract Loss) MJ for the pump.

9072-63*4-13.3=8,067 MJ

Now just for fun I'll convert this to EU using power converters and use it to make UU matter.

With these given values for the conversion IC2: 1800 BC/TE: 4375. The formula used is outputQuantity = inputQuantity * inputScale / outputScale

19,607=8,067*4375/1800

This is 19,607 EU/ tick. Now The matter fabricator requires 16.6 Million EU to make 1 UU. So 16,600,000/19,607=846 Ticks per UU Matter. 20 Ticks per second so 846/20=42.3 Seconds per UU Matter.

Subsequently this is a diamond every 42.3*9=380.7 Seconds per Diamond.

Now if on a server and assuming total chunk loaded this would be (60/42.3)*60*24 UU Per Day. 2,042 UU Per Day. If for whatever reason all of these were converted to Diamonds this would be 2,042/9 or 226 Diamonds per Day.

As you can see Using lava as a fuel souce in a boiler is incredibly effective and produces 19,607 EU/tick, 38 Ultimate Hybrids, or 8,067 MJ/ tick.