Spell viability for quirky builds?

For more experienced players: are all spell skills “viable” for T15s/Pinnacles given enough +all skills from items? Not ultra fast clearing, just viable?

I ask this because I’ve recently rolled a Tornado Shaman just to test what it could do and it became one of my most fun chars ever. With a level 34 tornado and a cheap 30 divs investment in gear it deals like; 35k physical dps, 80k fire/cold/lightning. I paired it with a cheap The Coming Calamity for 0 enemy resistance + alpha’s howl for double presence area and it’s great.

Juiced T15s and pinnacles are a breeze, I’m extremely impressed and its potential is bigger if I stack more +skills on it

Would all other generally “weak” spells also become viable if you get enough levels? I’d love to use some weird stuff just for fun.

Euphoric_Reading_401
3 | 8 hours ago
Yanatis
2 | 7 hours ago
subcuriousgeorge
3 | 6 hours ago
t0rchic
3 | 3 hours ago
Askon [OP]
1 | 3 hours ago
PoE_Acronym_Bot
1 | 8 hours ago
revanstone47
2 | 4 hours ago