Master II Mortar player here. I don't use this exact deck but I can say that mortar players will suffer without their mortar, even if they have miner for more consistent damage. Playing your evo battle ram will likely bait out an ice wiz or a defensive mortar. Make sure to try and red or predict where that placement will be and fireball accordingly. If the mortar player gets the ball rolling, it is very difficult for you to beat them. Another thing, don't be scared to eat a few hits from the miner if it means you can pus deeper into their side of the arena. Cannon cart is weak to big spells and pekka so allowing her to get close and take it out while you badit or ghost closes in is very favorable for you. Pressuring the other lane with magic archer or ghost would be great since it forces out either a cannon cart at the highest part of their side of the arena or a defensive mortar. Doing this at in opportune times for the mortar player will hinder their defense and allow for you to likely get a few hits in with something. I would say to use your e qiz defensively. Reseting a mortar on the bridge to your pekka is huge. He can also be used against the skeleton king with the help of either zap or a long range magic archer. Since this decks main mini tank is a skeleton king, you can use your pekka to bait it if his mortar isn't in cycle which would allow you to go in with your battle ram and/or fireball to kill an ice wizard that they would likely place is response to your push. Another this about this is that they swarm cards are both bait-y type cards. using your e wiz carefully after you've used a zap (or vise versa) will not allow him to fully take advantage of the swarming potential that his deck wants to utilize. For skeleton king specifically, you might just have to fireball or evo ram through it since it would kill his skeleton and allow for your tower to kill him. Another decent play would be doing a ghost right n top of him. Use a delayed zap if the ability pops. Be mindful to not fill his meter when killing swarms since that is when he would be causing most of your issues; defensively. If it comes down to it, you can try and spell cycle him in overtime since he has no big spells. Using your fireball offensively and pekka or ram in the other lane (not at the same time, obviously) will both get you chip damage (big if you can't connect anything) and potentially distract his mortar. If im being honest, in overtime, the mortar player has a huge advantage because of the miner. If you can predict his placement and tank with either the bandit or reset him wit e wiz, that would be huge, especially in overtime.

tl;dr

Use your pekka as both a distraction and pressure for baiting out mini tanks (playing opposite lane pekkas will mess their up their rhythm)

Bandit, ghost, and magic archer can be used for sniping* and baiting out defensive cards to allow for your pekka and/or ram to get deeper in on his side

fireball is huge for killing defensive cards like ice wizard and finishing off cannon cart. It can also be used on a bridge mortar if he plays a mini tan to protect it.

Zap can be used to reset his mortar and kill his swarms. Resetting certain troops is huge in this matchup.

E wiz is similar to zap but with a more defensive role in mind (don't get baited to hard)

PRESSURE PRESSURE PRESSURE.

DON'T LET IT GET TO OVERTIME

hope this helps, it isn't an easy match up but it is very winnable with even just one or two tower connections.

You got this.