500g mission on Relic Shield line is overly punishing missed cannons

Among the recent games I have played as a melee support, I have not been able to complete the mission before 15min on multiple accounts. I like to roam and make plays around the map at the expense of my own income while playing support. The problem occurs when my roaming timing overlaps with a cannon wave. I can simply play around a cannon wave timings, but even that does not guarentee a relic shield proc on cannon; it requires that an ally is near by, and I am not getting denied the cannon by both my teammate and enemy team.

Worst part of it is that roaming does no longer includes warding trips pre 15min. Using knowledge on enemy location and eliminating potential enemy jungler locations was huge part of my support gameplay. I am sure im not the only one who feels this way. This feels catered to autofilled supports rather than actual support players. I hope something will be done about it.