It's so satisfying getting a good CoP hit and hear that boom noise hitting like 10+ mobs
There's definitely technique to it, it's an excellent place to practice, as you'll need the technique later on, the mobs do get relatively harder as you go up levels so now's the perfect opportunity to get your muscle memory trained!
You can do a mixture of moves, get inferno down for sure, run around a bit, get blaze and a couple firewalls down too if you have time and it's a big enough lure to warrant it. Bit of running around and firestorm, with the odd CoP when it's safe-ish to do so.
Don't be embarrassed to use repulse to help you escape if things get a bit hairy, and keep an arcamon (literally anything) to hand, spawn it as a distraction to help you escape if you get stuck.
There's also the tactic of placing inferno carefully so there's 1 space between inferno and the wall, stand in that 1 space, so you have your back to a wall or corner so only a few mobs are hitting you at once, you'll take a lot less damage, and the mobs that are hitting you will be in your inferno!
Fire damage and PDR (physical damage reduction, not to be confused with PD - physical defence) are the key stats for a mid level wiz, not worth investing in at this stage as you'll grow out of kit too quickly, but if you find anything cheap that already has these stats then it's worth grabbing for sure!
Sorry kinda got carried away, hope some of that was helpful to you at least. Best of luck