Writing this for a buddy who has problems getting into warseer atm. It's from a topic on CotEC (the WoC specific site)

The scenario in question is how channeling works with reroll 1's (mark of tzeentch) and +1 to channel from for example channeling staff. Does a 1 become a 2 and you don't get to reroll it or does your 6+ channel become a 5+ and you can still roll a 1?

The rulebook doesn't specifically say that it works like armor save where a heavy armour for example gets you a 5+ so you can still roll a 1. This also becomes relevant when you have magic items that does "The bearer counts his armour save as being two points higher than normal" in combination with for example harmonic convergence from lore of heavens.

Page numbers not opinions please