Glad to see its somewhat updating. For the life of me soloing only as Entropy is so intense. No sustainables, companions, or use of bombs. I might just drop this out of pure frustration.
Oh well, I've pretty much finished my testing and as mentioned earlier, I don't think it's possible to only use Entropy spells to finish the game. 2 main damage spells (Arcane Bolt and Drain Life) just doesn't hit hard enough and even all Entropy spells is only 16 so you would need other spells anyways.
Going the Spirit Route (to avoid Primal), the early game seems easiest with learning Walking Bomb and Virulent Walking Bomb. Virulent hits extremely hard (close to 200) at low levels already and with both Bomb spells, even if one is resisted, usually both won't be. I learn Forcefield as well which is one of the most useful in general for most any build.
However, going this route means you don't even start Entropy spells till the Tower of Ishal and tactics and strategy is pretty boring since you fire off 2 bombs and sit in a forcefield and wait. The explosion is fun though. Virulent will possibly infect an alpha which is the main danger of blowing yourself up.
To deal with the Kokari wilds, you have 5 spells and easiest again is just 3 Death spells and 2 Telekinisis spells.
Using traps is actually more useful than bombs since it's the gift that keeps on giving. As you can also forcefield yourself, some very hard fights like the 2nd pack of wolves which always chain overwhelms you can be won easily while you're in forcefield and the traps continue to do damage. Without it and say, with only Walking Bomb, usually, a few of the wolves and the Alpha will be alive so you'll get chain Overwhelmed and die pretty consistently after forcefield runs out.
Death Cloud is pretty hard to get off so in my test with it, I just never could cast it. Also, to take both sleep and Death Cloud, the Kokari Wilds is harder since you sorta need forcefield to use Death Cloud since you don't have paralysis explosion (Which is only 3 spells and a much better line in general than most anything else).
You can try to make do with Sleep and Walking Bomb and Mindblast for the Kokari Wilds, but the 2nd Wolves fight is hard since you'll get chain overwhelmed and you don't have forcefield again.
If there's any videos you'd like to see, let me know and I can post it, but overall, I didn't find any of them that entertaining (since it's bomb x2, sit in forcefield with death syphon).
My other video with sleep, paralyze and blowing up 9 DS is actually a funner build (for me) since you don't rely on forcefield at all (only learn walking bomb) and run around a bit more in combat, but using that build is harder in dealing with the 2nd pack of wolves and you spam more mana potions without death syphon.
All these comments / strategies generally assumes you engage each mob group all at once (no pulling) and don't kite really.
Using bombs, you can do the 2nd wolf fight, but it's still a tough fight to not kite the alpha.