Depends what your killing simply.
A meteor boss such as deadroot would be best to use meteoric because its a long fight. Dies slowly, leaving a lot of time for you to put in damage with meteoric dagger, while you would waste time with icelord dagger because since its such a high boss, you typically miss a lot.
A rare wisp for example, would probably be best to use icelord dagger, because it dies very quick if your not soloing. Only use icelord dagger on a rare wisp, or quickly dieing boss like fellfire, chillmist etc...
Meteoric dagger is best for any high boss or whenever your soloing. Lower levels should use this. Adding dex helps you hit more and miss less so i reccomend just a little.
Icelord dagger for ksing mobs, rare wisp, etc. Only use if high level and have almost full strength. Best for skills hits. Higher level the better because more strength... meaning higher skills hit.
World - Sulis
Clan - Toxic
H3ROsRogue - lvl 220 rogue
H3ROsRanger - lvl 200 ranger
H3ROsMage - lvl 220 mage
H3ROsDruid - lvl 220 druid
H3ROsWarrior - lvl 200 warrior
H3ROsLocker - lvl 190 rogue
Can't imagine losing kills to a ranger in 2019.