keto diet for a couple of weeks to drop weight is a bad idea. as soon as you return to a diet with any decent amount of carbs, the water will all come back on. if i were you, i'd drop to maint cals and increase workload to create a cal deficit.
also, add lots of low-carb fruit n veggies like eggplant, broccoli, capsicum, berries, tomato etc so that you don't feel like you're hungry all the time.
and drink HEAPS of water. the more water you drink, the less you're body holds.
i do kinda agree with most of the other posts in here about adding some more size, but if you wanna stay really lean, do for it. work towards the physique that makes you happiest