That's not what's being asked, though. Sentinels have all their T9 primary powers set to 90 second recharge across the board - this applies to both the blaster nukes with longer recharges and the aberrant powers like Full Auto and Rain of Arrows with shorter recharges.
In AR's case, this is a mixed bag. Sentinel's Full Auto is significantly different all around, so it's hard to say it's actively worse:
Blaster Full Auto: 60s recharge, 80 range, 20 degree arc, 17 ticks of 10.13 lethal, 10% chance of extra 62.56 lethal
Sentinel Full Auto: 90s recharge, 40 range, 90 degree arc, 17 ticks of 7.03 lethal, possible additional up to 17 ticks of 2.91 lethal (16% chance)
Sentinel AR also gets a smoother early attack chain with Disorienting Shot and some additional late single target punch with Incinerator replacing Sniper Rifle (and being not Lethal!).
In Archery's case, it's pretty unambiguously bad for the set; the only benefit Sentinel gets is a slightly lower endurance cost for Rain of Arrows.
Blaster Rain of Arrows: 60s recharge, 90 range, 25 radius, 3 ticks of 75.07 lethal
Sentinel Rain of Arrows: 90s recharge, 40 range, 25 radius, 3 ticks of 37.58 lethal + 3 ticks of 15.48 lethal
Like AR, though, Sentinel Archery gets an arguably stronger ST attack chain with the addition of meaningful damage on Stunning Shot and Perfect Shot being very strong. (On the other hand, Sentinel's Aimed Shot is weaker but faster-recharging.)
Also worth noting: the numbers given in Pine's are lower than those reported by the server - Pine's reports a damage scale of 0.9 for sentinels, while the actual value on the server is 0.95.