You *could* skip filtration but ensure all the equipment IS ONE HUNDRED PERCENT STERILE. Utilise sufficient BA to keep it free from contaminations for as long as possible. Not ideal, but people have done it without problems. Keep it for personal use only and in small batches (0). You can use a .45 micron filter instead of a .22 micron filter (1). Using a syringe filter with a larger diameter can filter more gear in a given amount of time and with less force (2). You can also opt for carrier oils with the least viscosity (3) or by lowering the concentration of the gear (4) Warming up the gear prior to filtration might make it easier to filter (5). You can also play around with the amount of air inside the vial & syringe to aid drawing or depositing fluid (6). You can use larger syringes with bigger plungers you can exert more force upon (7). You can use higher gauge needles for drawing and depositing the gear (8). Finally, you can always employ a pump to filter the gear, although its extra complexity (9).
Thats all I can come up with off the top of my head right now.