Did a "quick" test.
Code:
06:13:06 - Selected ARC/DS method for Data1a-01.bin was: xtool:mkraken:core_2.9.10:lib_2:dd3:l10,d128mb
06:13:06 - Selected ARC/DS method for Data1b-01.bin was: xtool:dd3:l10,d128mb
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12:19:39 - Overall input size: 83,38 GB
12:19:39 - Overall output size: 70,59 GB (Ratio 84.65%)
12:19:39 - Overall conversion time: 06:06:31