Honestly, a large part of why I'm voting for Saint is that I'm not sure when we'll ever take Gisena buffs if we don't take them now. I truly think that's important, especially when there have been several warning signs slipped into recent chapters indicating Gisena could soon fall off in effectiveness. This is a problem, because Gisena needs to stay relevant:
I truly think that Gisena is a force multiplier better than even the absurd buffs of Bloodslayer. Bloodslayer provides overwhelming might, but does relatively little to buttress us against esoteric effects that bypass our defenses or seek to inflict debuffs upon us.
And importantly, esoteric effects have been what have brought us closest to losing both the Magus fight, and the golden archer fight.
Gisena is a defensive buff that protects against such problems, and an offensive buff by helping us determine where to strike. And that's not even considering the as-of-yet unknown effects of her Sorcerous Advancement (was that the name?)
When we started this character, we voted to take a companion along as a Lesser Remittance. Gisena is a part of our build, an important part of our progression, and likely a key part of our emotional narrative as well. She is not an extra "exp dump". Her power is our power. Don't let her power fade relative to the scaling of the quest, lest she become irrelevant or worse - dead.