That's not quite right.
It's usually helpful to say that you have an array worth so many points, and then how many different powers are in the array. Spend points equal to array value plus the number of powers -1, and each power gets the number of points in the array to play around with.
Example (Seika Seika no Mi)
40-point array: 8 alternate powers
Plant control 10, Area progression x5 (62500 sq. ft. area of entangle), Regenerating, reversible, selective, precise, triggered
Alt power : Ranged Paralysis Cloud DC 20 Fortitude save
Alt power : Ranged Nauseate Cloud DC 20 Fortitude save
Alt power: Ranged Confusion Cloud DC 20 Fortitude save
Alt power: Ranged Sleep(stun) Cloud DC 20 Fortitude save
Alt power: Ranged Drain(any one stat/save) Cloud DC 20 Fortitude save
Alt power : Create Objects 10 (Continuous, innate, precise, progression x5area, x1 range (250ft. cube per rank, 250 ft. range), reversible, triggered)
Alt power : Summon Minion (varied (exotic plants), heroic, unfriendly, permanent, ranged, innate, extended range x3, progression x6 (50 minion limit)) (must have sample seed of plant, must be fairly autonomous plant) see notes on which plants are available.
Alt power: Perception Range Disintegrate (plants only) 10
As you can see, I declared a 40 point array with nine powers in it. I spent 48 power points on it and get 9 powers that each get 40 points to spend on it. And, just like your fruit, each and every one is a valid use of my power. Each of the debilitating clouds are mushrooms or the like, the plant control and the create object are just growing things, the summon minion is just using my powers to grow one of the many incredibly dangerous plants in the one piece world (like the deadly Rage Island Fighting Cactus), while granting me zero control over them. The disintegrate is just making a plant run through it's entire life cycle incredibly quickly, turning it into compost in short order. Your guns would be similar.
Assuming your base to hit it +10...
Suggested array: 30 points
Perception range blast (sniper rifle) 10
Autofire 1 Blast 10 (Assault rifle)
Autofire 2 Blast 6, accurate x2, split x4 (autofire and split are a good combo) (Minigun)
Cone Penetrating Strike 10 (flamethrower)
And so on and so forth. that array costs 33 points, and for each alternate power after that costs another 1. Just add another power for each tactical application you can think of, and if you miss one and think of it during the game, just use a power stunt. Any passive effect of your fruit (metal hard skin, for example) should be a separate power so you can use them together.