Enel's Observation Haki is going to let him deal with Doflamingo's speed when he was matched in speed by pre gears Luffy and tagged multiple times. Seems legit.
It's like saying I can deal with the Flash's speed with my precog even though Spider-Man can match me.
It a make a no sense.
Enel's haki was BYPASSED By Luffy's attacks bouncing off the wall and thus catching him by SURPRISE as he could no longer read his moves. He then took advantage of that moment to hit Enel again while he was on the ground. Pre gears Luffy was not a match for Enel's Haki or his speed. Which is why he had to use that tactic in the first place. Luffy found a way to get around ENEL's haki with his unique Devil Fruit ability for a brief moment. Your argument only appeals to casuals and you'll once again side step this fact.
You're making these broad statements out of context of the fight. " Luffy tagged him multiple times" Thats not what really happened.I wouldm understand you better if Luffy Blitzed ENEL through his haki but he didnt.
Secondly Enel will not have to fight Doflamingo the same way he did Luffy. With everybody else he fought he one shotted them with his lightning. He didnt even attempt to use h2h. Just look at how he started the fight with luffy... an El thor.
Here is why he wins
Enel wont be caught be surprise due to basic knowledge of Doffy's abliity + Enel's haki.
Enel's lightning is well...lightning so doffy wont be able to dodge.
Enel wont have to go h2h he can simply use his travel speed and range to attack. ( something he couldnt do on Luffy by had on skypeia)
Its simple. Haki allows you to predict someone's moves before they make them. I dont see how doffy's speed will allow him to catch lightning. Enel wins.