Lock and Load: The Reassembled Machinist Guide

[Malin-HunnysMonsta]

Hello there! I apologise if the answer to this question is already featured in this topic, but I was wondering if someone could help me out here.

Basically, freshie lvl60 mch here hoping to get good as I'm really enjoy it as a secondary. Been studying the rotations here and slowly getting the hang of them (even through the whole keeping an eye on DoTs and buffs is a world away from the upkeep ease I have on my drg main, causing me to tunnel vision to a worrying degree on the Cross Bar haha ;;; )

I was practising in an extended fight this morning (A9 to be exact) and as I noticed that there were 2 mage DPS in my team I decided to use my Bishop Turret with the Hypercharge buff for the damage increase on the mages. Now, this might be a dumb question, but as I'm aware the Rook has more potency on single target like Refurbisher, is it right for me to change the Bishop over to Rook when the Hypercharge buff is over?
Or does the extra potency for my end not really matter and it's okay to just keep Bishop out throughout that fight for when Hypercharge comes off cooldown and just move it about the arena for adds?