Ok so after Harsha's post, here are the points that need to be discussed:
- Should Timid be the main nature in the set, with Harsha's ev spread (76 HP / 252 SpA / 180 Spe) to outspeed Scarf Terrakion, and to a lesser extend Scarf base 110 mons (Latios and Gengar)?
- If we decide to go with Modest, then which spread is better, the one in the OP (244 HP / 252 SpA / 12 Spe), or 4 HP / 252 SpA / 252 Spe to outspeed any Scarfer with 107 base Speed and below?
- Should i slash Hidden Power Ice with Hidden Power Fire?
My answers to these points are the following:
1. Timid shouldn't be the main nature in the set, and should be in the AC, since Leftovers Venusaur needs all the power he can get. Sure outspeeding Scarf Terrakion is very nice for sun teams, but in any game that you don't encounter one, the difference in power will be felt. Also outspeeding Scarf Latios is not so important since even with HP Ice (which isn't in the main set) you do very little damage to it(39.07 - 46.35% to 4 HP Latios), while he ohkoes back.
2. I think my spread is better. Since according to my reasoning Timid is out of the question for the main set, here are the Scarfers that you outspeed with max Speed:
Landorus
Mienshao (rare)
Salamence
Haxorus
Rotom-W
(tell me if i missed any)
Out of those, the only relevant one are Landorus and Rotom-W, which don't even come close to ohkoing with EQ (51.38 - 60.77%) and HP Fire in Sun respectively (54.14 - 64.08%).
Mienshao can't do anything back (34.25 - 40.6% with Stone Edge is the best he can do) and is rare as fuck. ScarfMence walls you since HP Ice is not in the main set, and considering that ScarfMence doesn't come in early game, since he is supposed to be a late game cleaner, Sleep Clause would most likely have been activated. Haxorus also walls you, but at least you can put him to sleep. Also against Haxorus you can never be sure if he is Scarf or Lum Berry, so if you waste a turn to Sleep him, while he ohkoes with Outrage, you are screwed.
So is outspeeding 2 scarfers that can't even do major damage back to you worth it losing all the bulk that 244 HP evs provide, which certainly matters when playing with this Venusaur, as i showed with my logs? Imo, no it isn't.
3. Finally i don't think that Hidden Power Ice should be in the main set, because it is a very weak coverage move, that comes from a medicore unboosted SpA stat, and cannot even kill some of his main targets (Lati@s, Celebi, Hydreigon, BU Breloom, Virizion). The only targets that HP Ice can seriously hurt and ko/almost ko are Dragonite (after SR), Salamence, Landorus (which takes a shitload from Solarbeam anyway), Gliscor (defensive sets can't to anything back, while getting 2hkoed from Solarbeam, while AcroBat Gliscor has a decent chance to get ohkoed from Solarbeam after SR((37.5%)) and this is it, i think.
HP Fire in the other hand gets boosted to an acceptable 105 BP in sun, and actually kills most of the targets it is supposed to, or comes very close in doing so (Ferrothorn, Celebi, Scizor, Skarmory, BU Breloom, Virizion, Forretress, Magnezone, Lucario).
So HP Ice is only worth an AC mention, imo, if your team has problems with ScarfMence and Dragonite.
Anyway i am expecting the QC members to answer to these 3 points, so that we can finally get somewhere with this analysis...
EDIT: @ Harsha
Sludge Bomb, Hidden Power Ice and Growth are all, already in the AC.