Only having magic missile for 175 levels…
Endgame plan is Wiz3/Linker2/Necro2.
Not really painful. Just get arde dagger at lv75. Link mobs and mm. Rinse repeat. Also use quick cast to include 50% damage. I went wiz3-linker-chronoc3. Omly after lv165+ then it gets tough haha
Magic missile destroys everything at early/mid level range so no, even more with links.
Tanky mobs will start popping at around r6, but at that point you will be able to use flesh hoop and flesh cannon for good damage (since you went linker for hoop at least) on top of linked magic missiles.
Drop Necro 2, take Warlock instead.
You won’t have many problems, mobs are easy to kill until level 200+