I ' m a plat 2 top and jg main however i have mained mid before when i was in low plat and high gold . My advice to you is play champions you win with i know you have very few games played with zed and diana you still have very high kdas and 75 % win rates on both continue to play champs you win with even if there not the best for example do not play yasuo yes hes fun as fuck but you have very poor results with him . Alright next up make sure to ward not just in the bushes but in the river more junglers like to come from behind you rather than through the river bushes so if you ward areas past the bush next to the mid lane such as the little bush semi through the river you stand a better chance at seeing an incoming gank and avoiding it . lastly dont be over aggresive yes you might have the upper hand in 1 v 1 fighting the mid lane is easiest to gank a good jg can avoid detection and gank you regardless of your wards so best tip is dont fight or hard push when u have no idea where there jg is once he appears top lane or bot or ou saw him recall if you feel confident then thats when you go in for the kill . so many times mid laners are over aggesive and get ganked endlessly and they become worthless . lastly look to roam when you diana and you hit 6 and your lane is fully pushed in look to go bot or top or even invade there jg and get some deep wards down .