His central midfield partner Reece Brew made it 2-0 when he met a half-clearance and hit a first-time shot from the edge of the penalty area.
Two minutes before halftime, right-flank marauder Kane Stirton swung in a 30-metre cross-cum-shot that sailed into the top far corner of the goal to make it 3-0.
In the 48th minute, a defensive mix-up ended with Thistle goalkeeper Raymond Rickard stranded and Lytton left midfielder Mat Hatten rolling the ball into the net.
Brew settled Jags nerves with his second goal, a 35-metre effort in the 62nd minute.
In the 76th minute, centreback Chris Spurr’s 50-metre pass set up striker Nic Somerton for Thistle’s fifth goal. Somerton rode one challenge before placing the ball wide of Lytton keeper Tariq Albert.
For Thistle, Shannon Dowsing, Spurr and Michael Rogers kept things tight in the middle of the defence, and central midfielders Mika, Brew and Phill Gill hardly wasted a ball.
Flank players Matt Smith, on the left, and Kane Stirton made good runs, and up front Craig Stirton and Somerton were always dangerous. Thistle’s shooting was often astray, but sometimes they came close . . . the Lytton crossbar took a hammering.
Lytton never gave up and developed some promising moves. Strikers Sonny Brady and Travis White found the Jags defence hard to break down, though.
Central midfielders Ryan Anderson and Merlin Parsons worked hard to link defence and attack, and Anderson pushed forward more in the second half to good effect.
The flank duties were shared by Mat Hatten and Jamil dos Santos on the left and Cole Bava and Luke Edwards on the right, but they got little change from Thistle fullbacks Matt Feisst and Jason Burgess.
Despite the scoreline, Lytton’s defence did well for much of the game. Centrebacks Harry Win-Hewetson, with his blocking of shots, and Stan Bodle, with his mobility and reading of the game, show promise. Rightback Tyler Evans and leftback Esteban Mariette were always looking to turn defence into attack.
Referee Jim Adcock let play flow and the game was played in good spirit.