OK. Here are some options. I've tried them and they are good enough that I wanted to repeat.
16 oz. Blackberry f-pac and 1 Cup French Oak chips in Primary; this will result in fruit forward with oak in the background. If you split the oak 1/2 in primary and 1/2 in secondary, then you'll end up with more oak forward. Your choice. I see you plan to short the water to 5 gallon which is my current preference for the Fontana and Wine Lover's kits I've done, but make sure you check with your hydrometer (since it depends on the concentrate) and shoot for a potential ABV of 12- 13%.
A second option that can work on either kit would be to replace the blackberries with 1/2C raisins (or black Zante currants) but not both raisins and blackberries.
You said the Cellar Master is a low end kit. I know Wine Lover's low end is around 7.5% with medium bodied at 11.5% and a high end around 13%. Fontana kits don't distinguish but I believe they are in the middle at 11.5%. If your's is around 7.5% to start with you may need to add some simple syrup or sugar as well as shorting the water to get to an ABV of your liking. As @joeswine
always says," let your hydrometer be your guide."
Keep us posted and do check out the "Tweaking Cheap Kits" thread as that's where I learned most of this.