After reading all the above, I was very apprehensive about today's run. Luckily, it wasn't that bad after all. I played carefully, and started killing mobs before finding any gods. When I found both JJ and EM (around the same time), I decided to go under EM as she really shines due to her awarding piety for stoning Revenants. Played carefully, doing 1 kill at a time, stoning the new Revenant, then breaking both it and the stoned mob just killed.
I don't really know how the whole Metal Spider Temple thing works exactly (what's the way to have both HP and mana saved in the Essence Potion?) but went in to get Whupaz and Essence Potions at level 7 (ready to ding to 8).
Didn't bother to use Entanglement for all kills, only when I needed it for higher level kills as I didn't want to clog up the whole map with plants. Also, I didn't stone every Revenant, most of them I just killed them especially towards the end when mopping up and preparing for the final fight (was also low on mana and blackspace then).
Super happy that I managed to through sheer luck and consequences, be able to get just enough XP to level up to Prestige 2 before converting to JJ for CA. Wasn't even sure until the very last moment - I was at 25/55 XP and needed 30 XP exactly to level up. There was Stheno and 1 last mob at the lower right corner (just had to break a few stoned stuff to see what it is). I counted before checking it out and it needed to be a level 9 for me to get 30 XP exactly (10 + 9 + 5 + 4 + 1 + 1 = 30). Was overjoyed when I saw it was indeed a level 9!
So, my luck helped me get top XP spot today, lost out slightly to
smuglapse for the top Piety spot.
