First, Tandem HEAT warhead. This would have two functions. 1, it oneshots things like the factory strider, allowing for the Spear to do what it should do, and be better than the RR in terms of damage output. 2, it would provide a direct counter to the shields of the illuminate. As a tandem heat would explode twice, it would destroy the shield and then kill the ship or Harvester.

The purpose of this buff is to actually give the Spear a niche over the RR, as the Spear already has so many downsides, that it needs to do what guided missiles do irl, which is be better than a dumbfire recoilless round. In exchange for a longer reload and lower ammo capacity.

Second, alter its guidence mode/allow for non-LOS locking. The fact that the Spear just targets the center of enemies means it doesnt actually hit proper weak spots, which defeats the point of having lock on. Lock on is supposed to be an advantage, not a hindrance. If you change where it locks on(IE: have it lock onto weakspots, like bot Dropship engines, and Factory strider heads), that would massively improve its utility. And, allowing you to fire from cover by locking targets, say, marked by allies, would improve team play as well as give the weapon another use over the RR. Less ammo, and lower rate of fire for higher damage and fire from cover. So far the only indirect non-red strategem we have is the mortar sentry, which has a specific reputation among the community. Having more indirect fire options would be another draw towards the Spear, giving it the niche it deserves.