Boyd didn't set the competition alight in his rookie campaign last summer but has performed nicely of late and given his high work rate, he must be pressing Merrick to make a tough call and pull Brockie back to the bench.
Another wildcard is the recent signing of former national league scoring sensation Roy Krishna, who made his debut for the Phoenix against the Mariners in last Sunday's 1-1 draw in Wellington, although no opportunities fell the way of the Fiji international in his cameo appearance.
It's more likely Krishna will be worked in to the mix slowly and Boyd could be given his first start of the season tomorrow in what may be the only change to the Phoenix from last week.
"I'm trying to get some consistency,'' Merrick said as he reflected on his squad for tomorrow's game.
All Whites utility Leo Bertos is a likely candidate to join the bench to give Merrick some flexibility with his substitutes.
"His benefit is he can play a range of positions. He can play at forward, he can play in the midfield and he can play at fullback so he is good cover.''
The third-placed Victory are coming off a 3-1 win over the Western Sydney Wanderers on Tuesday night and bring a dangerous side to Westpac Stadium with Gui Finkler, Kosta Barbarouses, Archie Thompson and James Troisi all posing a threat.
Merrick acknowledged the Victory would be a tricky side to keep in check compared to the Mariners.
"Victory is a different proposition. But their proposition is they play virtually with four strikers. So we've sat down, we've worked on what we are going to do but it's a different game all together from last week.''