User blog comment:B214/Shin DxD 1 discussion/@comment-95.210.189.106-20180809123512/@comment-28884330-20180811005120

@Bodo.b9 That's just your speculation, since Issei hasn't ever used D∞DBoost when not buffed by Ingvild's SG.

Also, who said Vali can't use Divide when in DxD L? Albion's powers, as mentioned in Volume 21, are dividing, absorbing and reflecting, along with poison, which means that Half Dimension, and by extension, Compression Divider, are forms of Divide. He has used both in DxD L, so your thing about him being unable to use it is incorrect.