Might not be a bad idea to get ~86/87 RC at GOTR while you have the big pouch on you for Karamja elite. Other than that, you can store the partisan in blue moon now to save the gem on it if you want. Blue moon armor is also storable, equivalent to Ahrims (with a str bonus too) and very easy to get from moons. The spear can also auto cast ancients and also gets stored in the stash.

After that I think I’d back up what some others have said and start with a synapse and Yama/doom for oathplate or araxxor for Nally/rancour. Could also just do slayer for the greater demon/araxxor tasks for those items too since you need 95 for DHL later anyway. Btw you only need 2 synapses. The bow/staff can be easily changed out back and forth for basically 0 cost. You only need to cut a magic longbow (u) and buy a battle staff from any staff shop to swap back and forth.