25-100 candies evolutions: which do you spam evolve?

not sure what your question is but i think you want to consider prestige teams - i have 2 teams at 1500 and 1200cp (i'd swap 1500 for 1400 cp in hindsight). oddish/bellsprout/hoppip are great presigers so it's worth hoarding 'mons that will evolve to those levels from the grass triples, water & ice and ofc wigglytuffs plus a raichu/jolteon.

nidos and zubat are certainly trash but abra and machop are worth hoarding candy for max level - they are terrible prestigers, dratini/larvitar ofc you want to level your best. fire and water starters suck at everything, ditto ghastly.

I evolve twice hoppip, bellsprout, and oddish as prestigers, but I only use bellsprout and oddish as prestigers for the CP ranges too high for paras to evolve into. I guess I could always level up some parasects for those ranges, but haven't yet. Parasect is a better grass prestiger than any of those except jumpluff. Jumpluff is the best grass prestiger out there, except possibly meganium.

Most of the starters also tend to make very good prestigers. In gen 2, meganium is a great one, and the others aren't as good.

However, who knows what will be coming with the gym rework. Prestiging may be totally different after that.

Do you live in a Grass biome or something? I've only managed to evolve a Victreebel with double grass this spring, though before the event.

While these events are happening I am 'saving my candy' in case more shiny drop at some point.
I am keeping enough candy to fully evolve and maybe power up as many various pokemon I can so that if anything arrives unannounced then I have it covered.

I would hate for them to drop a shiny and I get one early, and I don't have the candy to evolve and/or power it up.

Maybe I just have hoarding issues.

Spam evolve mareep, yeah right.

spam:
Nido M and Nido F
Zubat
Oddish
Bellsprout
Hoppip
Horsea
Poliwag
Squirtle

Also before I transfer them I use them for prestiging untill they die.

evolve twice:
Abra
Machop
Geodude
Dratini
Mareep
Larvitar
Gastly
All starters except squirtle