When you're saying speed, I'm assuming its based purely on reaction speed, (or one's fighting speed), correct? Cause there's two different types of speed, the one based one reaction, which is generally based on how fast you can perceive something and move your body out of the way. And Acceleration speed, i.e. general movement. Personally, I see the first as your defensive qualities and the second as your offensive. Naturally, canonically, the Fourth Hokage was able to react quick enough to evade the Fourth Raikage/Tobi without any buffs. I didn't see how he fought against Madara, but I'm not going to guesstimate on how he would fight whilst in an Edo Zombie body which provides zero exhaustion, physical or chakra based.
Now, I came late to the game, thus I never seen Tomi fight. But, naturally, I give those that has claimed Kage hats in a much higher regard. I mean, official Kages, not just going and making your own village and claiming to be Kage there. From the five major villages, to the minor villages, Ame, Oto, Uzu, Kaze... uhh trying to picture the map >.> Generally, those that have actually gotten the hat are obviously going to be particularly fast/strong/wise/smart/whatever you wanna call it, their stats are going to be better.
But if Tomi wants to have a go at Natural Fighting, we can test the waters, 1v1, no chakra, simply Taijutsu and not even our Sharingan. >.> Just gonna throw that out there.
The way I fight, I assume my opponent is stronger/faster/smarter unless I can prove otherwise in le fight. JayvAthos, I'll... shut up I can try. JayvTobi, well, I'm not smarter than him and his RL knowledge of science is pretty tough, but he has the best perception speed in the realm.... being a cyborg and all. JayvRyoji, we actually never fought before or after his transformation, but he's the most ruthless in his family... oh wow Athos you just need to give me some of your blood, there's something in those genes, I need it!!
So experience obviously wins the argument on how the RP web is spun, but individual training is where the argument grows just a bit more stagnant than usual. Using myself as an example, from the beginning, meaning my time here on SL, I've been training myself through the usage of Gravity Seals, which basically means that what was naturally beforehand is increased when they're off. But, by how much would that be? Since it was from hard work, would it be a lot? Would my sensei of choice matter? Village? Blood? Being words, you need leeway/understanding from your RP partner/opponent, otherwise things get frustrating on both ends and then those buffs have to come into play.
So, back to the topic of determining the speed of Tomi, just RP at however speed you've been RPing at before. I'm not sure what the character's been up to since you obvi weren't dead, but hopefully you've been training all that time as well. From there, it's only showcasing your speed to the public, getting some modern feats in and you'll be good. Obviously it's just like prison, find the biggest, baddest, mofo around and take em down. Since Bocc isn't around, you'll have to find the second baddest... obviously an Academy Student that walks into a zone and hits someone with a... what was it called, Biju Enhanced, Sage Enhance, Planetary Rasendori, while using Heavenly Pull and a two Eyed Kamui... I gotta learn how to do that.