Well I made this earlier today and I've done some Tap quests since then, but by 228 I'd ran out of quests to do so I had to slave away on quests giving me 2% each run. Wasn't too bad though. 240 is my next goal~
I grind the hell out of fiesta. I can AOE and OHKO at fiesta. I get up to 30% exp per run if I'm on a booster, 20-25% if I am not. That is up to 60% exp per day. That's a lot from only spending 20 minutes a day. If you cannot OHKO or AOE, you may get a lot less exp though.
After that, I do Shadow Daily Quests. If I do every single one of them, I get an 25% exp.
Combined, that is already up to 85% exp a day.
My goal is to get at least one level per day. My goal is therefore to hit Level 400 in 91 days, the deadline of which is August 1st. Rofl. That sounds so far away. I may have to get 90 boosters and open 1 a day until I hit Level 400.