A timelapse of 2 years will probably allow him to reach that point as a level 3 but I think he will evolve way before that.
If he evolves however, he will probably reach that number easily. If any level 4 HERO agent has enough power to deal with those threats, then MC will also get enough to compete or even surpass some of them.
I'm fairly sure that Level 4s have Power in the thousands. After all the are supposed to beat threats like the Himavat, Hugnir and Asura. For reference, MC thinks that the Asura is around 3000 power. So he probably isnt't putting any level 4s to shame yet. Although I suspect that he may be able to beat some of them in a duel. After all Shen seemed to have a lot of trouble.
Asura was strong enough to beat the A rank targeted by HERO but not that much stronger either since he was severly wounded .
But when mc said that his power was dwarfed ten times over, he talking about Asura power in his wounded state after a rough fight + Nico damages, so personnaly i see it more as a figure of speech to illustrate that he was still a lot more powerfull than mc was but not really ten times, or else he would be even above 3000 at his best because he necesseraly have spent a lot of power in is other fight, but he would still have 3000 power after all that? it's seem huge for a A rank who supposed to be handled by a level 4.
From what we can see, hero generally sends his agents in teams of 2,but it seem more like a precaution than anything,(like with Lexi and Clark against Ella, Dania/Deryl and mc against gorgon or Tifanny and mc against Claire) so 2 level 4s are more than enough to deal with any A rank monster but high evolution doesnt necessary mean huge power,and most superhuman seem to gain power much slowly than mc and is friends.
Danica evolved level 2 two day after her first evolution and was only 24 power 2 years after that when she faced mc, she also didnt have much time to progress before she evolved level 3 because of the severs injury inflicted to her by mc but still evolved level 3 quickly after, or Laurie who also far weaker for her level compared to mc and his friends.
We also have the Moon twin's or Henry who have evolved realy quickly (so without much time to gain power between each evolution) or Met who tied with Evander .
Shen seem to have some difficulties against level 3 mc too, but we must not forget that he wasn't trying to kill mc, and that capturing a target alive can be harder than killing it and Shen wasnt expecting mc tentacles to have some autonomy, so it's difficult to judge here even if he seem to have far much difficulties than he should have with a supposed gap that huge.
So for me level 4 average power have to be far lower than 3000, probably more arount 1500-2000 (even if some exception can exist like duncan with level 3 ) but still difficult to say for sure because we didnt see any level 4 fight so far.
But mc evolution seem to have a patern, 10-30 for the second and 100-300 for the third one, so 1000-3000 for the fourth is likely and would put him above regular level 4 but will WW continue doing that for the rest of them? it isnt certain at all because mc seem really far from reaching that amount of power, but since Ella mention in is letter that mc will disapear with her soon ( and because i still think that mc will stay with sin for a while because of Liz and Amber risk of monsterification during their evolution without Tanos serum), mc could realy progress further through unconventional way and/or a more direct help from Ella.
little edit about Danica power and Laurie.