Well you'll gain weight but I definitely would not do this.
I already vented my frustration in another keto thread.
If you're looking to mass up, keto is far from optimal. I can only ever see keto being useful when already lean 8% and wanting to get into competition body fat levels 6% and below.
This is coming from someone who thinks keto is a massive crock of shit. I'm sure the keto lovers will try their hardest to sway your opinion.
You say you found fat loss harder with carbs in the diet, this is because you hold WATER. Also with more glycogen you look smoother.
It's an illusion, little water retention makes you look a lot leaner...... A LOT. Especially when higher bf%.
Look at top pro's who have a lot of water retention from the AAS and even more from HGH. They look 10-12% when in reality they are 7% and a few weeks out from competition.