Biceps aren't really the limiting factor on any lift except curls.
Bingo
Biceps are one of the smallest muscless in the body. They "Aren't the limiting factor in any lift".
Biceps are one-third of the mass of the arms. Triceps are two-thirds.Biceps aren't simulated in my routine.
Biceps aren't simulated in my routine. Medium and long term goals would be rows and chin ups. I know those work the back with the bicep as assistance.
Biceps Stimulation
Biceps are dramatically stiumated in Pulling Movements; Rows, Lat Pulldowns, Olympic Pulls, etc.
Since Biceps are the smaller, weaker muscle in comparison to the Upper Back, the are stimulated and developed in Cpmpound Pulling Movements.
Right now I'm relying on the deadlifts for back stimulation.
Deadlift Upper Back Training
This is an incorrect assessment. In the Deadlift, an isometric is performed by the Lats.
The Lats are to some degree stiulated but to a lesser degree than you believe.
For optimal Lat Develpement. the key is to place the majority of work on them with Straight Arm Pull Downs, Bent Arm Pull Overs on Bench, etc.
Don't want lagging biceps when that time comes
Poor Investment
You obtain more than enough work and Biceps stimlation from Pulling Movements.
It amount to investing money in a saving account that pay 2% vs one that pays 5%.
A better investment in other areas of training will yield you greater benefits.